2490 lines
121 KiB
HTML
2490 lines
121 KiB
HTML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
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<head>
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<meta name="dc.date" scheme="iso8601" content="2005-09-06" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1997, 2006" />
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<meta name="owner" content="RCHCLERK@us.ibm.com" />
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<title>D</title>
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="d"></a>
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<h2 id="d">D</h2>
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<p>Return to <a href="as4glos.htm#as4glos">Glossary</a>.</p>
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<dl>
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<dt id="x2019201" class="bold">
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<a name="x2019201"></a>DAA</dt>
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<dd>See <a href="rzaatd.htm#x2020208">designated
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approving authority</a>.</dd>
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<dt id="x2019215" class="bold">
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<a name="x2019215"></a>daemon</dt>
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<dd>A program that runs unattended
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to perform continuous or periodic functions, such as network control.</dd>
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<dt id="x2019228" class="bold">
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<a name="x2019228"></a>DAF</dt>
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<dd>See <a href="rzaatd.htm#x2020223">destination
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address field</a>.</dd>
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<dt id="x2019232" class="bold">
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<a name="x2019232"></a>damaged logical unit of work</dt>
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<dd>The
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effect on protected resources caused by part of the resources committing and
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part rolling back.</dd>
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<dt id="x2019237" class="bold">
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<a name="x2019237"></a>DAP</dt>
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<dd>See <a href="rzaatd.htm#x2020642">directory
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access protocol</a>.</dd>
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<dt id="x2019241" class="bold">
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<a name="x2019241"></a>DARPA</dt>
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<dd>See <a href="rzaatd.htm#x2020023">Defense Advanced Research Projects Agency</a>.</dd>
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<dt id="x2001127" class="bold">
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<a name="x2001127"></a>data area</dt>
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<dd>A system object used to
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communicate data, such as CL variable values between the programs within a
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job and between jobs. The system-recognized identifier for the data area is
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*DTAARA.</dd>
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<dt id="x2019248" class="bold">
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<a name="x2019248"></a>data authority</dt>
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<dd>A specific authority
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to read, add, update, or delete data, to run a program, or to search a library
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or directory.</dd>
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<dt id="x2019253" class="bold">
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<a name="x2019253"></a>database (DB)</dt>
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<dd>A collection of interrelated
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or independent data items that are stored together to serve one or more applications.</dd>
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<dt id="x2001137" class="bold">
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<a name="x2001137"></a>database administrator (DBA)</dt>
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<dd>A person
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who is responsible for the design, development, operation, security, maintenance,
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and use of a database.</dd>
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<dt id="x2019261" class="bold">
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<a name="x2019261"></a>database file</dt>
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<dd>One of several types
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of the system object type *FILE kept in the system that contains descriptions
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of how input data is to be presented to a program from internal storage and
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how output data is to be presented to internal storage from a program.</dd>
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<dt id="x2001182" class="bold">
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<a name="x2001182"></a>database management system (DBMS)</dt>
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<dd>See <a href="rzaatd.htm#x2001187">database manager</a>.</dd>
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<dt id="x2001187" class="bold">
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<a name="x2001187"></a>database manager</dt>
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<dd>A program that manages
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data by providing the services of centralized control, data independence,
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and complex physical structures for efficient access, integrity, recovery,
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concurrency control, privacy, and security.</dd>
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<dt id="x2019272" class="bold">
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<a name="x2019272"></a>database reference field</dt>
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<dd>In the Data
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Description Specifications Design Utility (DSU), a field in a data description
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specifications (DDS) source file that is created by referring to the description
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of an existing field in a database file.</dd>
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<dt id="x2083435" class="bold">
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<a name="x2083435"></a>data cache unit (DC, DCU)</dt>
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<dd>A high-speed
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buffer storage that contains frequently accessed instructions and data to
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reduce access time.</dd>
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<dt id="x2019277" class="bold">
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<a name="x2019277"></a>data character set</dt>
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<dd>See <a href="rzaatc.htm#x2016602">character set</a>.</dd>
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<dt id="x2019281" class="bold">
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<a name="x2019281"></a>data circuit-terminating equipment (DCE)</dt>
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<dd>The equipment that provides signal conversion and coding between the
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data terminal equipment (DTE) and the line. The DCE provides all the functions
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required to establish, maintain, and end a connection. A DCE may be either
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separate equipment or an integral part of the DTE or of the intermediate equipment.
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A DCE may perform other functions that are usually performed at the network
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end of the line.</dd>
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<dt id="x2019286" class="bold">
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<a name="x2019286"></a>data clause</dt>
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<dd>In COBOL, a clause in
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a data description entry in the Data Division that describes a particular
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characteristic of a data item.</dd>
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<dt id="x2019291" class="bold">
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<a name="x2019291"></a>data code page</dt>
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<dd>In Network File System
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(NFS), a list of the data name components of the files that are exported to
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and mounted on the specified NFS client or netgroup.</dd>
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<dt id="x2052695" class="bold">
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<a name="x2052695"></a>data communication</dt>
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<dd>Transfer of data
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among functional units by means of data transmission protocols.</dd>
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<dt id="x2019301" class="bold">
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<a name="x2019301"></a>data compression</dt>
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<dd>The reduction of
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data volume on the media when performing save operations.</dd>
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<dt id="x2019306" class="bold">
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<a name="x2019306"></a>data conversion</dt>
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<dd>(1) The process of changing
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data from one form of representation to another.</dd>
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<dd>(2) The process of
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changing from one coded character set identifier (CCSID) to another. A system
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does data conversion when exchanging data with another system that is using
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a different CCSID.</dd>
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<dt id="x2019314" class="bold">
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<a name="x2019314"></a>data country code (DCC)</dt>
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<dd>A 3-digit
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code, unique to each country or region, that specifies the X.21 call format
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used by a network in its International Data Number to call another station.
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See also <a href="rzaatd.htm#x2019542">data network identification code</a>.</dd>
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<dt id="x2019319" class="bold">
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<a name="x2019319"></a>data decompression</dt>
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<dd>Reconstruction
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of data from a compressed format when performing a restore operation.</dd>
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<dt id="x2019324" class="bold">
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<a name="x2019324"></a>data definition (DD)</dt>
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<dd>(1) In IDDU, information
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that describes the contents and characteristics of a field, record, or file.</dd>
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<dd>(2) In the C and C++ languages, a definition that describes a data
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object, reserves storage for a data object, and can provide an initial value
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for a data object. A data definition appears outside a function or at the
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beginning of a block statement. IBM®.</dd>
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<dt id="x2001237" class="bold">
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<a name="x2001237"></a>Data Definition Language (DDL)</dt>
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<dd>A
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language for describing data and its relationships in a database.</dd>
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<dt id="x2019332" class="bold">
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<a name="x2019332"></a>data description entry</dt>
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<dd>In COBOL,
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an entry in the Data Division that describes the characteristics of a data
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item.</dd>
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<dt id="x2019337" class="bold">
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<a name="x2019337"></a>data description specifications (DDS)</dt>
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<dd>A description of the user's database or device files that is entered
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into the system in a fixed form. The description is then used to create files.</dd>
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<dt id="x2019342" class="bold">
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<a name="x2019342"></a>Data Description Specifications Design Utility
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(DSU)</dt>
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<dd>A feature of the CoOperative Development Environment/400
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licensed program that helps users develop and create display files, printer
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files, and database files.</dd>
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<dt id="x2019347" class="bold">
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<a name="x2019347"></a>data dictionary</dt>
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<dd>In IDDU, an object
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for storing field, record format, and file definitions. The system-recognized
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identifier for the object type is *DTADCT.</dd>
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<dt id="x2274308" class="bold">
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<a name="x2274308"></a>data division</dt>
|
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<dd>One of the four main
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parts of a COBOL program. The data division describes the files to be used
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in the program and the records contained within the files. It also describes
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any internal working storage records that are needed.</dd>
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<dt id="x2019362" class="bold">
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<a name="x2019362"></a>data dump</dt>
|
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<dd>In COBOL, the contents
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of the data areas used by a program that has failed.</dd>
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<dt id="x2019367" class="bold">
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<a name="x2019367"></a>data-encrypting key</dt>
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<dd>In Cryptographic
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Support, a key used to encrypt data that is not a cryptographic key. Used
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with the CPHDTA and GENMAC commands.</dd>
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<dt id="x2019372" class="bold">
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<a name="x2019372"></a>Data Encryption Algorithm (DEA)</dt>
|
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<dd>In Cryptographic Support, equivalent to the Data Encryption Standard. Adopted
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by the American National Standards Institute in 1981.</dd>
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<dt id="x2019377" class="bold">
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|
<a name="x2019377"></a>Data Encryption Standard (DES)</dt>
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<dd>A
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cryptographic algorithm designed to encrypt and decrypt data using a private
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key.</dd>
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<dt id="x2019382" class="bold">
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<a name="x2019382"></a>data file</dt>
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<dd>(1) In RJE, a remote job input
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stream that can contain host system commands and job control language as well
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as data.</dd>
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<dd>(2) A group of related data records organized in a specific
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order. A data file can be created by the specification of FILETYPE(*DATA)
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on the create commands. See also <a href="rzaatc.htm#x2017423">command file</a>, <a href="rzaats.htm#x2039373">source file</a>.</dd>
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<dt id="x2019390" class="bold">
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<a name="x2019390"></a>data file utility (DFU)</dt>
|
|
<dd>The part
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of the Application Development ToolSet licensed program that is used to enter,
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maintain, and display records in a database file.</dd>
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<dt id="x2140290" class="bold">
|
|
<a name="x2140290"></a>data flow control layer (DFC layer)</dt>
|
|
<dd>In SNA, the layer within a half-session that (a) controls whether the half-session
|
|
can send or receive, or both send and receive request units (RUs) at the same
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|
time, (b) combines related RUs into RU chains, (c) defines the limits of transactions
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|
by using the bracket protocol, (d) controls the connection of requests and
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responses in accordance with control modes specified when the session is started,
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(e) creates sequence numbers, and (f) associates requests with responses.</dd>
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<dt id="x2019400" class="bold">
|
|
<a name="x2019400"></a>datagram</dt>
|
|
<dd>A form of asynchronous messaging
|
|
in which an application sends a message, but does not require a response.</dd>
|
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<dt id="x2019416" class="bold">
|
|
<a name="x2019416"></a>data group</dt>
|
|
<dd>(1) In Business Graphics Utility,
|
|
a collection of values that identify the comparisons in a chart. For example,
|
|
the relative size of the slices in a pie chart or the relative height of the
|
|
bars in a bar chart. See also <a href="rzaatd.htm#x2019643">data value</a>.</dd>
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<dd>(2) In the GDDM® function, a collection of data values displayed, for example, as
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a pie chart or as the plotted points on a line of a line chart. More than
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one data group may be displayed on a chart.</dd>
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<dt id="x2019424" class="bold">
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|
<a name="x2019424"></a>data hierarchy</dt>
|
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<dd>In COBOL, the relationship
|
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between a group item or record and the group data items and elementary data
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items that make it up.</dd>
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<dt id="x2019429" class="bold">
|
|
<a name="x2019429"></a>data integrity</dt>
|
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<dd>The condition that
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exists as long as accidental or intentional destruction, alteration, or loss
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of data does not occur.</dd>
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<dt id="x2019437" class="bold">
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<a name="x2019437"></a>data interchange</dt>
|
|
<dd>The use of data
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by systems of different manufacture.</dd>
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<dt id="x2019442" class="bold">
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|
<a name="x2019442"></a>data interchange format (DIF)</dt>
|
|
<dd>In iSeries™ Access, a format that presents data in rows and columns.</dd>
|
|
<dt id="x2019447" class="bold">
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<a name="x2019447"></a>data item</dt>
|
|
<dd>(1) In COBOL, a character or
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|
a set of consecutive characters (excluding literals in either case) defined
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|
as a unit of data by the COBOL program.</dd>
|
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<dd>(2) A unit of information
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to be processed.</dd>
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<dt id="x2019455" class="bold">
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<a name="x2019455"></a>data label</dt>
|
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<dd>In Business Graphics Utility
|
|
and the GDDM function, a text string that describes a set of data values. Data
|
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labels are used with bar charts, pie charts, and Venn diagrams.</dd>
|
|
<dt id="x2019465" class="bold">
|
|
<a name="x2019465"></a>data line</dt>
|
|
<dd>(1) In the GDDM function, a
|
|
line drawn parallel to a chart axis, through a specified value along the other
|
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axis.</dd>
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<dd>(2) In Business Graphics Utility, a straight line drawn from
|
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either axis that shows the exact data values on the chart.</dd>
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<dt id="x2019473" class="bold">
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<a name="x2019473"></a>data link</dt>
|
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<dd>The physical connection
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(communications lines, modems, controller, work stations, other communications
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equipment), and the rules (protocols) for sending and receiving data between
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two or more locations in a data network.</dd>
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<dt id="x2019478" class="bold">
|
|
<a name="x2019478"></a>datalink</dt>
|
|
<dd>A field in a database file
|
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that contains a link to an object. The link is in the form of a uniform resource
|
|
locator (URL).</dd>
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<dt id="x2019483" class="bold">
|
|
<a name="x2019483"></a>data link connection identifier (DLCI)</dt>
|
|
<dd>The field in a Q.922 frame that is used for frame relay routing. Each
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DLCI identifies a frame relay virtual circuit.</dd>
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<dt id="x2140295" class="bold">
|
|
<a name="x2140295"></a>data link control layer (DLC layer)</dt>
|
|
<dd>In communications, the layer that consists of the link stations that schedule
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|
data transfer over a link between two nodes and perform error control for
|
|
the link. Examples of data link control are SDLC and HDLC. See also <a href="rzaatd.htm#x2140290">data flow control layer</a>.</dd>
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<dt id="x2083468" class="bold">
|
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<a name="x2083468"></a>data link control protocol (DLC)</dt>
|
|
<dd>The protocol layer used by nodes on a data link to accomplish an orderly exchange
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of information.</dd>
|
|
<dt id="x2052766" class="bold">
|
|
<a name="x2052766"></a>data link escape character (DLE, DLE character)</dt>
|
|
<dd>In binary synchronous communication (BSC), a transmission control
|
|
character used to indicate that the next character is a control character,
|
|
not a data character.</dd>
|
|
<dt id="x2019500" class="bold">
|
|
<a name="x2019500"></a>DataLink File Manager</dt>
|
|
<dd>A system function
|
|
that maintains the status of objects that are linked to a database file through
|
|
a datalink.</dd>
|
|
<dt id="x2019505" class="bold">
|
|
<a name="x2019505"></a>data link layer</dt>
|
|
<dd>In the Open Systems
|
|
Interconnection reference model, the layer that provides services to transfer
|
|
data between entities in the network layer over a communication link. The
|
|
data link layer detects and possibly corrects errors that may occur in the
|
|
physical layer.</dd>
|
|
<dt id="x2019510" class="bold">
|
|
<a name="x2019510"></a>data link protocol</dt>
|
|
<dd>The rules that
|
|
govern control of the physical connection for sending and receiving data between
|
|
two or more locations in a network. Examples of data link protocols include
|
|
(a) asynchronous, (b) binary synchronous communications (BSC), (c) Ethernet,
|
|
(d) synchronous data link control (SDLC), (e) token-ring network, and (f)
|
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X.25. See also <a href="rzaatc.htm#x2017684">communications line</a>.</dd>
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|
<dt id="x2019515" class="bold">
|
|
<a name="x2019515"></a>data management</dt>
|
|
<dd>The part of the operating
|
|
system that controls the storing and accessing of data to or from an application
|
|
program. The data can be on internal storage (for example, database), on external
|
|
media (diskette, tape, or printer), or on another system.</dd>
|
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<dt id="x2019519" class="bold">
|
|
<a name="x2019519"></a>data mapping</dt>
|
|
<dd>The process of changing
|
|
characters from one form of representation to another, such as from zoned
|
|
decimal to packed decimal.</dd>
|
|
<dt id="x2210574" class="bold">
|
|
<a name="x2210574"></a>data migration</dt>
|
|
<dd>The movement of data
|
|
when the software is upgraded or the data is transferred to a different hardware
|
|
server or model.</dd>
|
|
<dt id="x2019528" class="bold">
|
|
<a name="x2019528"></a>data mode</dt>
|
|
<dd>In data communications,
|
|
a time during which BSC is sending or receiving characters on the communications
|
|
line.</dd>
|
|
<dt id="x2019533" class="bold">
|
|
<a name="x2019533"></a>data multiplexer</dt>
|
|
<dd>See <a href="rzaatm.htm#x2088196">multiplexed device</a>.</dd>
|
|
<dt id="x2019537" class="bold">
|
|
<a name="x2019537"></a>data name</dt>
|
|
<dd>In COBOL, a user-defined
|
|
word that names a data item. When used in the general formats, data name represents
|
|
a word that cannot be subscripted, indexed, or qualified unless specifically
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|
permitted by the rules of that format. See also <a href="rzaati.htm#x2024831">identifier</a>.</dd>
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<dt id="x2019542" class="bold">
|
|
<a name="x2019542"></a>data network identification code (DNIC)</dt>
|
|
<dd>A 4-digit code that specifies the X.21 call format used by a network
|
|
in its International Data Number to call another station. The first three
|
|
numbers are the data country or region code, and the last number is the country
|
|
or region network identifier. See also <a href="rzaatd.htm#x2019314">data country
|
|
code</a>.</dd>
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<dt id="x2019547" class="bold">
|
|
<a name="x2019547"></a>data object</dt>
|
|
<dd>(1) An object that conveys
|
|
information, such as text, graphics, audio, or video. See also <a href="rzaatm.htm#x2029488">machine object</a>.</dd>
|
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<dd>(2) A program variable that provides operational
|
|
and possibly representational characteristics to byte strings in spaces.</dd>
|
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<dt id="x2019555" class="bold">
|
|
<a name="x2019555"></a>Dataphone digital service (DDS)</dt>
|
|
<dd>The AT&T line service that allows the customer to transmit data on the
|
|
line in a digital format.</dd>
|
|
<dt id="x2019560" class="bold">
|
|
<a name="x2019560"></a>data pointer</dt>
|
|
<dd>A pointer that provides
|
|
addressability and scalar representational attributes to a byte string in
|
|
a space.</dd>
|
|
<dt id="x2019565" class="bold">
|
|
<a name="x2019565"></a>data policy</dt>
|
|
<dd>The collection of protocols
|
|
that governs Phase II negotiations.</dd>
|
|
<dt id="x2019570" class="bold">
|
|
<a name="x2019570"></a>data queue</dt>
|
|
<dd>An object that is used
|
|
to communicate and store data used by several programs in a job or between
|
|
jobs. The system-recognized identifier is *DTAQ.</dd>
|
|
<dt id="x2019575" class="bold">
|
|
<a name="x2019575"></a>data reference line</dt>
|
|
<dd>In the GDDM function, a
|
|
data line that also acts as a shading boundary for the first data group of
|
|
a surface chart, histogram, or composite bar chart, or for all the data groups
|
|
of a multiple bar chart. If no data reference line is present, such data groups
|
|
are shaded from the horizontal axis.</dd>
|
|
<dt id="x2019580" class="bold">
|
|
<a name="x2019580"></a>data server</dt>
|
|
<dd>A device on a local area
|
|
network (LAN) that provides services, data, or facilities for other devices
|
|
on the network.</dd>
|
|
<dt id="x2019585" class="bold">
|
|
<a name="x2019585"></a>data service unit (DSU)</dt>
|
|
<dd>A device
|
|
that provides a digital data service interface directly to the data terminal
|
|
equipment. The DSU provides loop equalization, remote and local testing capabilities,
|
|
and a standard EIA/CCITT interface.</dd>
|
|
<dt id="x2019590" class="bold">
|
|
<a name="x2019590"></a>data stream</dt>
|
|
<dd>All information (data
|
|
and control commands) sent over a data link usually in a single read or write
|
|
operation. For example, a data stream is used to send displays and to receive
|
|
displays from a workstation device.</dd>
|
|
<dt id="x2019595" class="bold">
|
|
<a name="x2019595"></a>data structure</dt>
|
|
<dd>(1) In OSI, the syntactic
|
|
structure of symbolic expressions and their storage allocation characteristics.
|
|
In OSI Communications Subsystem, data structures are created by the Abstract
|
|
Syntax Checker.</dd>
|
|
<dd>(2) An area of storage that defines the layout of
|
|
the fields, called subfields, within the area. A data structure is program
|
|
described.</dd>
|
|
<dt id="x2019606" class="bold">
|
|
<a name="x2019606"></a>data terminal equipment (DTE)</dt>
|
|
<dd>(1) A device
|
|
on a data link that sends and receives data, and provides data communications
|
|
control functions according to protocols.</dd>
|
|
<dd>(2) In OSI, a physical node
|
|
on a network.</dd>
|
|
<dt id="x2019614" class="bold">
|
|
<a name="x2019614"></a>data token</dt>
|
|
<dd>In OSI, the token that
|
|
controls which peer entity has permission to send on a half-duplex connection.</dd>
|
|
<dt id="x2019619" class="bold">
|
|
<a name="x2019619"></a>data tower</dt>
|
|
<dd>In AFP™ Utilities, a
|
|
set of Intelligent Printer Data Stream™ commands that
|
|
represent a data type, such as text, image, graphics, and bar code.</dd>
|
|
<dt id="x2019624" class="bold">
|
|
<a name="x2019624"></a>data traffic</dt>
|
|
<dd>In data communications,
|
|
the quantity of data transmitted past a particular point in a path.</dd>
|
|
<dt id="x2001307" class="bold">
|
|
<a name="x2001307"></a>data type</dt>
|
|
<dd>(1) In programming languages,
|
|
a set of values together with a set of permitted operations. A data type determines
|
|
the kind of value that a variable can assume or that a function can return.</dd>
|
|
<dd>(2) In SQL, an attribute of columns, literals, host variables, special
|
|
registers, and the results of functions and expressions.</dd>
|
|
<dd>(3) An attribute
|
|
used for defining data as either numeric or character.</dd>
|
|
<dd>(4) In OSI,
|
|
a category of data clearly defined using a data declaration method, such as
|
|
ASN.1 or Pascal.</dd>
|
|
<dt id="x2019643" class="bold">
|
|
<a name="x2019643"></a>data value</dt>
|
|
<dd>In Business Graphics Utility,
|
|
a single, numeric data item entered as a value for a horizontal line or vertical
|
|
line. See also <a href="rzaatd.htm#x2019416">data group</a>.</dd>
|
|
<dt id="x2019648" class="bold">
|
|
<a name="x2019648"></a>data warehousing</dt>
|
|
<dd>A set of hardware
|
|
and software components that can be used to analyze large amounts of data
|
|
for making effective business decisions. For example, data warehousing can
|
|
be used to analyze daily sales information, customer orders, products, inventory,
|
|
and schedules.</dd>
|
|
<dt id="x2001332" class="bold">
|
|
<a name="x2001332"></a>date</dt>
|
|
<dd>A three-part value that designates
|
|
a day, month, and year. For example, YYYY-MM-DD.</dd>
|
|
<dt id="x2001337" class="bold">
|
|
<a name="x2001337"></a>date duration</dt>
|
|
<dd>A DECIMAL(8,0) value
|
|
that represents a number of years, months, and days.</dd>
|
|
<dt id="x2001342" class="bold">
|
|
<a name="x2001342"></a>datetime value</dt>
|
|
<dd>A value of the data
|
|
type DATE, TIME, or TIMESTAMP.</dd>
|
|
<dt id="x2083542" class="bold">
|
|
<a name="x2083542"></a>DB</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019253">database</a>.</dd>
|
|
<dt id="x2019658" class="bold">
|
|
<a name="x2019658"></a>dB</dt>
|
|
<dd>See <a href="rzaatd.htm#x2083618">decibel</a>.</dd>
|
|
<dt id="x2019725" class="bold">
|
|
<a name="x2019725"></a>DB2® Query Manager (Query Manager)</dt>
|
|
<dd>Part of the DB2 Query Manager and SQL Development Kit licensed program that is a
|
|
collection of tools used to obtain information from the DB2 UDB for iSeries database. DB2 Query Manager can also be used to create query definitions,
|
|
to run new or existing query definitions, or to format query information.</dd>
|
|
<dt id="x2225025" class="bold">
|
|
<a name="x2225025"></a>DB2 UDB for iSeries</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019739">DB2 Universal Database™ for iSeries</a>.</dd>
|
|
<dt id="x2047601" class="bold">
|
|
<a name="x2047601"></a>DB2 UDB Query Manager and SQL Development
|
|
Kit</dt>
|
|
<dd>The IBM licensed program that is one of the DB2 UDB family of
|
|
products. Query Manager allows users to develop SQL queries and reports. The
|
|
SQL Development Kit allows programmers to develop SQL applications.</dd>
|
|
<dt id="x2019739" class="bold">
|
|
<a name="x2019739"></a>DB2 Universal Database for iSeries (DB2 UDB for iSeries)</dt>
|
|
<dd>The integrated relational database manager on the server.
|
|
It provides access to and protection for data. It also provides advanced functions
|
|
such as referential integrity and parallel database processing.</dd>
|
|
<dt id="x2009001" class="bold">
|
|
<a name="x2009001"></a>DBA</dt>
|
|
<dd>See <a href="rzaatd.htm#x2001137">database
|
|
administrator</a>.</dd>
|
|
<dt id="x2394401" class="bold">
|
|
<a name="x2394401"></a>DBCS</dt>
|
|
<dd>See <a href="rzaatd.htm#x2001652">double-byte
|
|
character set</a>.</dd>
|
|
<dt id="x2019663" class="bold">
|
|
<a name="x2019663"></a>DBCS code</dt>
|
|
<dd>The hexadecimal code, 2
|
|
bytes in length, that identifies a double-byte character.</dd>
|
|
<dt id="x2019668" class="bold">
|
|
<a name="x2019668"></a>DBCS conversion</dt>
|
|
<dd>A function of the
|
|
operating system that allows a display station user to enter alphanumeric
|
|
data and request that the alphanumeric data be converted to double-byte data.</dd>
|
|
<dt id="x2019673" class="bold">
|
|
<a name="x2019673"></a>DBCS conversion dictionary</dt>
|
|
<dd>A table
|
|
used by the conversion function to map alphanumeric entries to double-byte
|
|
entries. The system-recognized identifier for the object type is *IGCDCT.</dd>
|
|
<dt id="x2019678" class="bold">
|
|
<a name="x2019678"></a>DBCS data</dt>
|
|
<dd>In DB2 UDB for iSeries, data that is associated with a double-byte character set.</dd>
|
|
<dt id="x2019683" class="bold">
|
|
<a name="x2019683"></a>DBCS-either</dt>
|
|
<dd>Pertaining to a character
|
|
string that is either SBCS or bracketed DBCS, but not both. See also <a href="rzaatd.htm#x2019698">DBCS-graphic</a>, <a href="rzaatd.htm#x2019713">DBCS-open</a>, <a href="rzaatd.htm#x2044301">DBCS-only</a>.</dd>
|
|
<dt id="x2019688" class="bold">
|
|
<a name="x2019688"></a>DBCS font file</dt>
|
|
<dd>A system-supplied
|
|
file that holds the 24x24 character images of one of the following groups
|
|
of commonly used characters: 1) Japanese non-Kanji and basic-Kanji, 2) Korean
|
|
non-Hangeul/non-Hanja, Hangeul, and a subset of Hanja, 3) Traditional Chinese
|
|
non-Chinese and a subset of primary Chinese characters, or 4) all IBM-defined
|
|
Simplified Chinese characters.</dd>
|
|
<dt id="x2019693" class="bold">
|
|
<a name="x2019693"></a>DBCS font table</dt>
|
|
<dd>A system-supplied
|
|
table that holds either 24x24 or 32x32 pel character images of a double-byte
|
|
character set. A Japanese 24x24 DBCS font table holds Japanese extended Kanji
|
|
and user-defined characters. A Korean 24x24 DBCS font table holds a subset
|
|
of Hanja and user-defined characters. A Traditional Chinese 24x24 DBCS font
|
|
table holds a subset of primary Traditional Chinese, all secondary Chinese,
|
|
and user-defined characters. A Simplified Chinese 24x24 DBCS font table holds
|
|
IBM-supplied Simplified Chinese characters as well as user-defined characters.
|
|
A 32x32 DBCS font table holds 32x32 pel character images of a double-byte
|
|
character set, including its user-defined characters. The system-recognized
|
|
identifier for the object type is *IGCTBL.</dd>
|
|
<dt id="x2019698" class="bold">
|
|
<a name="x2019698"></a>DBCS-graphic</dt>
|
|
<dd>Pertaining to a character
|
|
string in which each character is represented by 2 bytes. Used only with the
|
|
EBCDIC encoding scheme. The character string does not contain shift-out (SO)
|
|
and shift-in (SI) characters. See also <a href="rzaatd.htm#x2019683">DBCS-either</a>, <a href="rzaatd.htm#x2019713">DBCS-open</a>, <a href="rzaatd.htm#x2044301">DBCS-only</a>.</dd>
|
|
<dt id="x2019703" class="bold">
|
|
<a name="x2019703"></a>DBCS number</dt>
|
|
<dd>The decimal value, 5
|
|
digits in length, that identifies a double-byte character.</dd>
|
|
<dt id="x2044301" class="bold">
|
|
<a name="x2044301"></a>DBCS-only</dt>
|
|
<dd>Pertaining to a character
|
|
string that is only bracketed DBCS. See also <a href="rzaatd.htm#x2019683">DBCS-either</a>, <a href="rzaatd.htm#x2019698">DBCS-graphic</a>, <a href="rzaatd.htm#x2019713">DBCS-open</a>, <a href="rzaatg.htm#x2023912">graphic data type</a>.</dd>
|
|
<dt id="x2019713" class="bold">
|
|
<a name="x2019713"></a>DBCS-open</dt>
|
|
<dd>Pertaining to a character
|
|
string that can be a mixture of SBCS and bracketed DBCS. See also <a href="rzaatd.htm#x2019683">DBCS-either</a>, <a href="rzaatd.htm#x2019698">DBCS-graphic</a>, <a href="rzaatd.htm#x2044301">DBCS-only</a>.</dd>
|
|
<dt id="x2019718" class="bold">
|
|
<a name="x2019718"></a>DBCS sort table</dt>
|
|
<dd>A system-supplied
|
|
object that contains sequencing information to sort double-byte characters.
|
|
The system-recognized identifier for the object type is *IGCSRT.</dd>
|
|
<dt id="x2009021" class="bold">
|
|
<a name="x2009021"></a>DBMS</dt>
|
|
<dd>See <a href="rzaatd.htm#x2001182">database
|
|
management system</a>.</dd>
|
|
<dt id="x2052913" class="bold">
|
|
<a name="x2052913"></a>DC</dt>
|
|
<dd>See <a href="rzaatd.htm#x2083435">data
|
|
cache unit</a>.</dd>
|
|
<dt id="x2172348" class="bold">
|
|
<a name="x2172348"></a>DCA</dt>
|
|
<dd>See <a href="rzaatd.htm#x2126660">Document
|
|
Content Architecture</a>.</dd>
|
|
<dt id="x2019744" class="bold">
|
|
<a name="x2019744"></a>DCC</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019314">data
|
|
country code</a>.</dd>
|
|
<dt id="x2009029" class="bold">
|
|
<a name="x2009029"></a>DCE</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019281">data
|
|
circuit-terminating equipment</a>.</dd>
|
|
<dt id="x2019752" class="bold">
|
|
<a name="x2019752"></a>D-channel</dt>
|
|
<dd>See <a href="rzaatd.htm#x2156997">delta channel</a>.</dd>
|
|
<dt id="x2210290" class="bold">
|
|
<a name="x2210290"></a>DCM</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020561">Digital
|
|
Certificate Manager</a>.</dd>
|
|
<dt id="x2244596" class="bold">
|
|
<a name="x2244596"></a>DCT</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020228">destination
|
|
control table</a>.</dd>
|
|
<dt id="x2083557" class="bold">
|
|
<a name="x2083557"></a>DCU</dt>
|
|
<dd>See <a href="rzaatd.htm#x2083435">data
|
|
cache unit</a>.</dd>
|
|
<dt id="x2083562" class="bold">
|
|
<a name="x2083562"></a>DD</dt>
|
|
<dd>(1) See <a href="rzaatd.htm#x2019324">data
|
|
definition</a>.</dd>
|
|
<dd>(2) See <a href="rzaatd.htm#x2020381">device driver</a>.</dd>
|
|
<dt id="x2019765" class="bold">
|
|
<a name="x2019765"></a>DDE client</dt>
|
|
<dd>In VisualAge® RPG, a
|
|
part that provides the function of receiving dynamic data exchange (DDE) data
|
|
from another DDE-enabled application.</dd>
|
|
<dt id="x2019770" class="bold">
|
|
<a name="x2019770"></a>DDE server</dt>
|
|
<dd>In VisualAge RPG, a
|
|
program entity that provides dynamic data exchange (DDE) data to another DDE-enabled
|
|
application. In VisualAge RPG, all components have DDE server functionality.</dd>
|
|
<dt id="x2019778" class="bold">
|
|
<a name="x2019778"></a>DDI</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020900">distributed
|
|
data interface</a>.</dd>
|
|
<dt id="x2009041" class="bold">
|
|
<a name="x2009041"></a>DDL</dt>
|
|
<dd>See <a href="rzaatd.htm#x2001237">Data
|
|
Definition Language</a>.</dd>
|
|
<dt id="x2019782" class="bold">
|
|
<a name="x2019782"></a>DDM</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020905">distributed
|
|
data management</a>.</dd>
|
|
<dt id="x2191929" class="bold">
|
|
<a name="x2191929"></a>DDM Architecture</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020910">Distributed Data Management Architecture</a>.</dd>
|
|
<dt id="x2019786" class="bold">
|
|
<a name="x2019786"></a>DDM file</dt>
|
|
<dd>A system object with type
|
|
*FILE, created by a user on the local (source) system, that identifies a data
|
|
file that is kept on a remote (target) system. The DDM file provides the information
|
|
needed for a local system to locate a remote system and to access the data
|
|
in the remote data file.</dd>
|
|
<dt id="x2019791" class="bold">
|
|
<a name="x2019791"></a>DDN</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020028">Defense
|
|
Data Network</a>.</dd>
|
|
<dt id="x2043801" class="bold">
|
|
<a name="x2043801"></a>DDS</dt>
|
|
<dd>(1) See <a href="rzaatd.htm#x2019337">data
|
|
description specifications</a>.</dd>
|
|
<dd>(2) See <a href="rzaatd.htm#x2019555">Dataphone
|
|
digital service</a>.</dd>
|
|
<dt id="x2019801" class="bold">
|
|
<a name="x2019801"></a>DDSA</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020566">digital
|
|
data service adapter</a>.</dd>
|
|
<dt id="x2019805" class="bold">
|
|
<a name="x2019805"></a>DEA</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019372">Data
|
|
Encryption Algorithm</a>.</dd>
|
|
<dt id="x2019809" class="bold">
|
|
<a name="x2019809"></a>dead-letter queue</dt>
|
|
<dd>A queue to which
|
|
a queue manager or application sends messages that cannot be delivered to
|
|
their correct destination.</dd>
|
|
<dt id="x2001417" class="bold">
|
|
<a name="x2001417"></a>deadlock</dt>
|
|
<dd>Unresolved contention for
|
|
the use of a resource.</dd>
|
|
<dt id="x2019817" class="bold">
|
|
<a name="x2019817"></a>deallocate</dt>
|
|
<dd>To release a resource
|
|
that is assigned to a specific task.</dd>
|
|
<dt id="x2019822" class="bold">
|
|
<a name="x2019822"></a>debug</dt>
|
|
<dd>To detect, diagnose, and eliminate
|
|
errors in programs.</dd>
|
|
<dt id="x2019827" class="bold">
|
|
<a name="x2019827"></a>debugger</dt>
|
|
<dd>A tool used to detect and
|
|
trace errors in computer programs.</dd>
|
|
<dt id="x2019832" class="bold">
|
|
<a name="x2019832"></a>debugging line</dt>
|
|
<dd>(1) A COBOL statement
|
|
run only when the WITH DEBUGGING MODE clause is specified. Debugging lines
|
|
can help determine the cause of an error.</dd>
|
|
<dd>(2) In COBOL, any line with
|
|
a D in the indicator area of the line.</dd>
|
|
<dt id="x2019840" class="bold">
|
|
<a name="x2019840"></a>debugging section</dt>
|
|
<dd>In COBOL, a declaratives
|
|
section that receives control when an identifier, filename, or procedure-name
|
|
is encountered in the Procedure Division.</dd>
|
|
<dt id="x2019845" class="bold">
|
|
<a name="x2019845"></a>debug mode</dt>
|
|
<dd>(1) An environment in which
|
|
programs can be tested.</dd>
|
|
<dd>(2) A mode in which a program provides detailed
|
|
output about its activities to aid a user in detecting and correcting errors
|
|
in the program itself or in the configuration of the program or system.</dd>
|
|
<dt id="x2083618" class="bold">
|
|
<a name="x2083618"></a>decibel (dB)</dt>
|
|
<dd>A unit of signal strength
|
|
or loudness, such as the signal on a data communications channel.</dd>
|
|
<dt id="x2019853" class="bold">
|
|
<a name="x2019853"></a>decimalization table</dt>
|
|
<dd>In Cryptographic
|
|
Support, a table of 16 decimal characters that is used to convert a hexadecimal
|
|
value to a decimal value. Each hexadecimal digit is used as an offset in the
|
|
(decimalization) table and is replaced with the value found there.</dd>
|
|
<dt id="x2019858" class="bold">
|
|
<a name="x2019858"></a>decimal position</dt>
|
|
<dd>(1) The location of
|
|
the decimal point in a series of numbers.</dd>
|
|
<dd>(2) Numbers to the right
|
|
of the decimal point. For example, 4.009 has three decimal positions.</dd>
|
|
<dt id="x2019866" class="bold">
|
|
<a name="x2019866"></a>declaration</dt>
|
|
<dd>In the C and C++ languages,
|
|
a description that makes an external object or function available to a function
|
|
or a block statement.</dd>
|
|
<dt id="x2019871" class="bold">
|
|
<a name="x2019871"></a>declaratives</dt>
|
|
<dd>In COBOL, a set of one
|
|
or more special-purpose sections, at the beginning of the Procedure Division
|
|
that can be used for error checking or debugging.</dd>
|
|
<dt id="x2019876" class="bold">
|
|
<a name="x2019876"></a>declarative sentence</dt>
|
|
<dd>In COBOL, a
|
|
compiler-directing statement that specifies when a debugging section or an
|
|
exception/error procedure is to be run.</dd>
|
|
<dt id="x2019881" class="bold">
|
|
<a name="x2019881"></a>decompression</dt>
|
|
<dd>A function that exchanges
|
|
control characters for actual data.</dd>
|
|
<dt id="x2019886" class="bold">
|
|
<a name="x2019886"></a>decrypt</dt>
|
|
<dd>(1) To decipher data.</dd>
|
|
<dd>(2) In Cryptographic Support, to convert ciphertext into plaintext. See
|
|
also <a href="rzaate.htm#x2026757">encrypt</a>.</dd>
|
|
<dt id="x2019894" class="bold">
|
|
<a name="x2019894"></a>decryption</dt>
|
|
<dd>In computer security,
|
|
the process of transforming encoded text or ciphertext into plaintext.</dd>
|
|
<dt id="x2140426" class="bold">
|
|
<a name="x2140426"></a>dedicated line</dt>
|
|
<dd>A connection not requiring
|
|
dialing to establish communication.</dd>
|
|
<dt id="x2019899" class="bold">
|
|
<a name="x2019899"></a>dedicated save operation</dt>
|
|
<dd>An operation
|
|
that the user runs to save objects when no other jobs are running. See also <a href="rzaats.htm#x2037662">save-while-active operation</a>.</dd>
|
|
<dt id="x2019904" class="bold">
|
|
<a name="x2019904"></a>Dedicated Server for Domino® (DSD)</dt>
|
|
<dd>An iSeries server that
|
|
is specially designed to run Lotus® Domino servers and applications.</dd>
|
|
<dt id="x2019909" class="bold">
|
|
<a name="x2019909"></a>dedicated service tools (DST)</dt>
|
|
<dd>(1) Service
|
|
functions that are available only from the console and can run when the operating
|
|
system is not available, as well as when the operating system is available.</dd>
|
|
<dd>(2) The part of the service function used to service the system when
|
|
the operating system is not running.</dd>
|
|
<dt id="x2019914" class="bold">
|
|
<a name="x2019914"></a>dedicated system</dt>
|
|
<dd>A system intentionally
|
|
reserved for a single job or task.</dd>
|
|
<dt id="x2403001" class="bold">
|
|
<a name="x2403001"></a>de-editing</dt>
|
|
<dd>In COBOL, the logical
|
|
removal of all editing characters from a numeric edited data item to determine
|
|
the unedited numeric value of the item.</dd>
|
|
<dt id="x2019924" class="bold">
|
|
<a name="x2019924"></a>default</dt>
|
|
<dd>Pertaining to an attribute,
|
|
value, or option that is assumed when none is explicitly specified.</dd>
|
|
<dt id="x2019935" class="bold">
|
|
<a name="x2019935"></a>default configuration</dt>
|
|
<dd>In OSI, the
|
|
set of default configuration and initialization values supplied with OSI Communications
|
|
Subsystem. The user can change the default configuration, which is provided
|
|
by initial records supplied in the subsystem information base shipped with
|
|
OSI Communications Subsystem.</dd>
|
|
<dt id="x2019940" class="bold">
|
|
<a name="x2019940"></a>default delivery</dt>
|
|
<dd>The method of delivering
|
|
messages to a message queue without interrupting the job, and sending the
|
|
system-assigned reply for any messages requiring a reply. Messages are placed
|
|
on the message queue only if the message queue is QSYSOPR; otherwise, the
|
|
messages are discarded by the system. For messages requiring a reply, replies
|
|
are sent before the messages are discarded.</dd>
|
|
<dt id="x2019950" class="bold">
|
|
<a name="x2019950"></a>default entry point</dt>
|
|
<dd>An entry point
|
|
in a user's program that receives control from the operating system when a
|
|
user runs an application.</dd>
|
|
<dt id="x2019955" class="bold">
|
|
<a name="x2019955"></a>default error handler</dt>
|
|
<dd>The part of
|
|
the RPG logic cycle that handles program or file exceptions/errors when program
|
|
or file exceptions/errors are not controlled by the programmer.</dd>
|
|
<dt id="x2019960" class="bold">
|
|
<a name="x2019960"></a>default focal point</dt>
|
|
<dd>In SNA, a network
|
|
node that receives alerts from nodes that do not have defined focal points.
|
|
See also <a href="rzaatp.htm#x2034455">primary focal point</a>.</dd>
|
|
<dt id="x2019965" class="bold">
|
|
<a name="x2019965"></a>default form</dt>
|
|
<dd>A temporary object that
|
|
contains the description of the format of a printed or displayed report, which
|
|
was built without explicitly specifying a form to be applied against it.</dd>
|
|
<dt id="x2019970" class="bold">
|
|
<a name="x2019970"></a>default network message queue</dt>
|
|
<dd>A message
|
|
queue to which messages related to network activity are sent when either the
|
|
user profile does not have a message queue specified or the message queue
|
|
named in the user profile cannot be used.</dd>
|
|
<dt id="x2019975" class="bold">
|
|
<a name="x2019975"></a>default network output queue</dt>
|
|
<dd>An output
|
|
queue to which spooled files are sent when either the user does not have an
|
|
output queue specified or the output queue name in the user profile cannot
|
|
be used.</dd>
|
|
<dt id="x2210448" class="bold">
|
|
<a name="x2210448"></a>default password</dt>
|
|
<dd>A password that
|
|
is the same as the service tools user ID. For example, the IBM-supplied QSECOFR
|
|
service tools user ID is shipped with a default password of QSECOFR.</dd>
|
|
<dt id="x2019980" class="bold">
|
|
<a name="x2019980"></a>default printer</dt>
|
|
<dd>A printer that is
|
|
assigned to a system or user and accepts all the printed output from that
|
|
system or user, if no other printer is specified.</dd>
|
|
<dt id="x2019985" class="bold">
|
|
<a name="x2019985"></a>default profile</dt>
|
|
<dd>The profile that
|
|
is assigned ownership of an object if the original owning profile is deleted
|
|
or damaged.</dd>
|
|
<dt id="x2019993" class="bold">
|
|
<a name="x2019993"></a>default program</dt>
|
|
<dd>A user-specified
|
|
program that is assumed when no other program is specifically named on a debug
|
|
command, or a user-defined program for handling error messages.</dd>
|
|
<dt id="x2019998" class="bold">
|
|
<a name="x2019998"></a>default record</dt>
|
|
<dd>A record that consists
|
|
entirely of default values (numeric fields are filled with zeros; character
|
|
fields are filled with blanks; and fields of either data type (numeric or
|
|
character) can be filled with a value specified by the user with the DFT keyword
|
|
in DDS).</dd>
|
|
<dt id="x2020003" class="bold">
|
|
<a name="x2020003"></a>default reply</dt>
|
|
<dd>A system-assigned reply
|
|
to an inquiry or notify message, which is used when the message queue at which
|
|
the message arrives is in default delivery mode.</dd>
|
|
<dt id="x2020008" class="bold">
|
|
<a name="x2020008"></a>default routing entry</dt>
|
|
<dd>In SNADS, the
|
|
routing table entry specifying the route to be used when the table contains
|
|
no explicit routing entry.</dd>
|
|
<dt id="x2020013" class="bold">
|
|
<a name="x2020013"></a>default user name</dt>
|
|
<dd>A system-provided
|
|
name for a user identification for a computer system that does not want to
|
|
require separate user identifications.</dd>
|
|
<dt id="x2020023" class="bold">
|
|
<a name="x2020023"></a>Defense Advanced Research Projects Agency (DARPA)</dt>
|
|
<dd>The United States Department of Defense agency responsible for
|
|
creating ARPANET, a large TCP/IP network. This agency was formerly called
|
|
the Advanced Research Projects Agency (ARPA).</dd>
|
|
<dt id="x2020028" class="bold">
|
|
<a name="x2020028"></a>Defense Data Network (DDN)</dt>
|
|
<dd>The MILNET,
|
|
ARPANET, and TCP/IP networks and protocols.</dd>
|
|
<dt id="x2020033" class="bold">
|
|
<a name="x2020033"></a>deferred maintenance</dt>
|
|
<dd>The process
|
|
of waiting until the system can be powered down to repair or replace a failed
|
|
disk-related hardware component.</dd>
|
|
<dt id="x2020038" class="bold">
|
|
<a name="x2020038"></a>deferred work element (DWE)</dt>
|
|
<dd>The catalyst
|
|
used to call event-driven services controlled within CICS®. A DWE causes
|
|
a unit of work to be scheduled later, normally at the end of the task or just
|
|
before or after syncpoint.</dd>
|
|
<dt id="x2020043" class="bold">
|
|
<a name="x2020043"></a>defined address</dt>
|
|
<dd>A named set of a)
|
|
Internet Protocol (IP) addresses, or b) interface names and point-to-point
|
|
profiles. This set is classified as trusted, untrusted, or border.</dd>
|
|
<dt id="x2020048" class="bold">
|
|
<a name="x2020048"></a>definite response (DR)</dt>
|
|
<dd>In SNA, a
|
|
value in the response-requested field of the request header that directs the
|
|
receiver of the request to return a response unconditionally, whether positive
|
|
or negative, to that request. See also <a href="rzaate.htm#x2027181">exception response</a>, <a href="rzaatn.htm#x2061619">no response</a>.</dd>
|
|
<dt id="x2020053" class="bold">
|
|
<a name="x2020053"></a>definition specification</dt>
|
|
<dd>In RPG,
|
|
a specification used for data definitions. This specification includes defining
|
|
the following: data structures, data-structure subfields, named constants,
|
|
arrays, and stand-alone fields.</dd>
|
|
<dt id="x2053058" class="bold">
|
|
<a name="x2053058"></a>defragmentation</dt>
|
|
<dd>The process of running
|
|
a software utility to rewrite fragmented data to contiguous sectors of a computer
|
|
storage medium to improve access and retrieval time. See also <a href="rzaatf.htm#x2023444">fragmentation</a>.</dd>
|
|
<dt id="x2020058" class="bold">
|
|
<a name="x2020058"></a>delay characteristic</dt>
|
|
<dd>The average
|
|
amount of time required for an operation (such as call setup, call clearing,
|
|
data transfer, and so forth) to be performed on a packet-switching network.</dd>
|
|
<dt id="x2020063" class="bold">
|
|
<a name="x2020063"></a>delayed maintenance</dt>
|
|
<dd>A method of logging
|
|
changes to an access path for database files and applying the changes the
|
|
next time the file is opened instead of rebuilding the access path completely
|
|
or maintaining it immediately. See also <a href="rzaati.htm#x2024971">immediate maintenance</a>, <a href="rzaatr.htm#x2035950">rebuild maintenance</a>.</dd>
|
|
<dt id="x2020068" class="bold">
|
|
<a name="x2020068"></a>delegate</dt>
|
|
<dd>A user who is authorized
|
|
to work for another user. The authorization can be made by a user or by the
|
|
office administrator.</dd>
|
|
<dt id="x2020073" class="bold">
|
|
<a name="x2020073"></a>delete authority</dt>
|
|
<dd>A data authority
|
|
that allows the user to remove entries from an object; for example, delete
|
|
messages from a message queue or delete records from a file. See also <a href="rzaata.htm#x2013151">add authority</a>.</dd>
|
|
<dt id="x2001457" class="bold">
|
|
<a name="x2001457"></a>delete trigger</dt>
|
|
<dd>A trigger that is
|
|
associated with a delete operation.</dd>
|
|
<dt id="x2001462" class="bold">
|
|
<a name="x2001462"></a>delimited identifier</dt>
|
|
<dd>In SQL, a sequence
|
|
of one or more characters of the standard character set enclosed within SQL
|
|
escape characters that are used to form a name.</dd>
|
|
<dt id="x2020084" class="bold">
|
|
<a name="x2020084"></a>delimited scope statement</dt>
|
|
<dd>In COBOL,
|
|
any statement that includes its explicit scope terminator.</dd>
|
|
<dt id="x2001467" class="bold">
|
|
<a name="x2001467"></a>delimiter</dt>
|
|
<dd>A flag that is formed by
|
|
a character or a sequence of characters in order to group or separate items
|
|
of data by marking the beginning and end of a unit of data. The delimiter
|
|
is not a part of the flagged unit of data.</dd>
|
|
<dt id="x2001472" class="bold">
|
|
<a name="x2001472"></a>delimiter token</dt>
|
|
<dd>In SQL, a string
|
|
constant, a delimited identifier, a symbol (for example, ||, /, *, +, or -),
|
|
or other special characters.</dd>
|
|
<dt id="x2156997" class="bold">
|
|
<a name="x2156997"></a>delta channel (D-channel)</dt>
|
|
<dd>In ISDN,
|
|
a common channel used for signaling and management of the network. In a basic
|
|
rate interface, the D-channel operates at 16 kilobits per second. In a primary
|
|
rate interface, the D-channel operates at 64 kilobits per second. See also <a href="rzaatb.htm#x2156694">bearer channel</a>.</dd>
|
|
<dt id="x2020098" class="bold">
|
|
<a name="x2020098"></a>demodulate</dt>
|
|
<dd>To return the frequency
|
|
of a signal to its original level.</dd>
|
|
<dt id="x2020103" class="bold">
|
|
<a name="x2020103"></a>denial-of-service attack</dt>
|
|
<dd>In computer
|
|
security, an assault on a network that brings down one or more hosts on a
|
|
network such that the host is unable to perform its functions properly. Network
|
|
service is interrupted for some period.</dd>
|
|
<dt id="x2020108" class="bold">
|
|
<a name="x2020108"></a>dependency</dt>
|
|
<dd>In the Application Development
|
|
Manager feature of the Application Development ToolSet licensed program, the
|
|
relationship between two parts where one part requires another part in order
|
|
to be built.</dd>
|
|
<dt id="x2020113" class="bold">
|
|
<a name="x2020113"></a>dependent file</dt>
|
|
<dd>The file in a constraint
|
|
relationship that contains the foreign key. See also <a href="rzaatp.htm#x2033179">parent file</a>.</dd>
|
|
<dt id="x2001482" class="bold">
|
|
<a name="x2001482"></a>dependent logical unit (DLU)</dt>
|
|
<dd>A logical
|
|
unit that requires assistance from a system services control point (SSCP)
|
|
to instantiate an LU-to-LU session. See also <a href="rzaati.htm#x2002401">independent
|
|
logical unit</a>, <a href="rzaati.htm#x2002401">independent logical unit</a>.</dd>
|
|
<dt id="x2020121" class="bold">
|
|
<a name="x2020121"></a>dependent logical unit requester (DLUR)</dt>
|
|
<dd>An advanced program-to-program communications (APPC) application that
|
|
allows dependent secondary logical units (LU 0, 1, 2, and 3) an entry point
|
|
into the Advanced Peer-to-Peer Networking® (APPN) network.
|
|
DLUR support gives the appearance of having an adjacent connection to VTAM®, but allows traversing the APPN network through intermediate nodes.</dd>
|
|
<dt id="x2001487" class="bold">
|
|
<a name="x2001487"></a>dependent row</dt>
|
|
<dd>A row that contains
|
|
a foreign key that matches the value of a parent key in the parent row. The
|
|
foreign key value represents a reference from the dependent row to the parent
|
|
row. See also <a href="rzaatp.htm#x2003638">parent row</a>.</dd>
|
|
<dt id="x2001492" class="bold">
|
|
<a name="x2001492"></a>dependent table</dt>
|
|
<dd>A table that is a
|
|
dependent in at least one referential constraint. See also <a href="rzaatd.htm#x2001507">descendent table</a>, <a href="rzaatp.htm#x2003643">parent table</a>.</dd>
|
|
<dt id="x2020132" class="bold">
|
|
<a name="x2020132"></a>dequeue</dt>
|
|
<dd>To remove items from a queue.
|
|
See also <a href="rzaate.htm#x2026897">enqueue</a>.</dd>
|
|
<dt id="x2020140" class="bold">
|
|
<a name="x2020140"></a>dereferencing</dt>
|
|
<dd>In VisualAge RPG, the
|
|
action of removing iSeries-specific information from a control.</dd>
|
|
<dt id="x2020145" class="bold">
|
|
<a name="x2020145"></a>deregister</dt>
|
|
<dd>In the hierarchical file
|
|
system, to remove an underlying file system and the specific functions it
|
|
supports from the application programming interface layer and to make it unavailable
|
|
to user applications.</dd>
|
|
<dt id="x2020150" class="bold">
|
|
<a name="x2020150"></a>derived form</dt>
|
|
<dd>A query management form
|
|
that was built by converting a Query definition object.</dd>
|
|
<dt id="x2020155" class="bold">
|
|
<a name="x2020155"></a>derived name</dt>
|
|
<dd>In REXX, the stem of
|
|
the symbol, in uppercase, followed by the tail in which all simple symbols
|
|
have been replaced by their value. It is also the default value of a compound
|
|
symbol.</dd>
|
|
<dt id="x2020160" class="bold">
|
|
<a name="x2020160"></a>derived query</dt>
|
|
<dd>A query management
|
|
query that was built by converting a Query definition object.</dd>
|
|
<dt id="x2020165" class="bold">
|
|
<a name="x2020165"></a>DES</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019377">Data
|
|
Encryption Standard</a>.</dd>
|
|
<dt id="x2001502" class="bold">
|
|
<a name="x2001502"></a>descendent row</dt>
|
|
<dd>A row that is a dependent
|
|
of another row or a descendent of a dependent row.</dd>
|
|
<dt id="x2001507" class="bold">
|
|
<a name="x2001507"></a>descendent table</dt>
|
|
<dd>A table that is
|
|
in a dependent relationship to a parent table, or to another descendent table.
|
|
See also <a href="rzaatd.htm#x2001492">dependent table</a>.</dd>
|
|
<dt id="x2020175" class="bold">
|
|
<a name="x2020175"></a>descending key</dt>
|
|
<dd>The values by which
|
|
data is arranged from the highest value to the lowest value of the key field,
|
|
in accordance with the rules for comparing data items. See also <a href="rzaata.htm#x2014101">ascending key</a>.</dd>
|
|
<dt id="x2020180" class="bold">
|
|
<a name="x2020180"></a>descending key sequence</dt>
|
|
<dd>The arrangement
|
|
of data in order from the highest value of the key field to the lowest value
|
|
of the key field. See also <a href="rzaata.htm#x2014106">ascending key sequence</a>.</dd>
|
|
<dt id="x2020185" class="bold">
|
|
<a name="x2020185"></a>descending sequence</dt>
|
|
<dd>The arrangement
|
|
of data in order from the highest value to the lowest value, according to
|
|
the rules for comparing data. See also <a href="rzaata.htm#x2014111">ascending sequence</a>.</dd>
|
|
<dt id="x2020198" class="bold">
|
|
<a name="x2020198"></a>deselect</dt>
|
|
<dd>To cancel a previously selected
|
|
object.</dd>
|
|
<dt id="x2020203" class="bold">
|
|
<a name="x2020203"></a>deselection</dt>
|
|
<dd>The process of removing
|
|
selection from a previously selected object.</dd>
|
|
<dt id="x2020208" class="bold">
|
|
<a name="x2020208"></a>designated approving authority (DAA)</dt>
|
|
<dd>The official who has the authority to accept the security safeguards for an
|
|
information system. The DAA may be responsible for issuing an accreditation
|
|
statement that records the decision.</dd>
|
|
<dt id="x2020213" class="bold">
|
|
<a name="x2020213"></a>design window</dt>
|
|
<dd>In VisualAge RPG, the
|
|
window in the GUI design tool suite on which parts are placed to create a
|
|
user interface.</dd>
|
|
<dt id="x2020218" class="bold">
|
|
<a name="x2020218"></a>destination address</dt>
|
|
<dd>The location
|
|
to which information is to be sent. See also <a href="rzaats.htm#x2039343">source
|
|
address</a>.</dd>
|
|
<dt id="x2020223" class="bold">
|
|
<a name="x2020223"></a>destination address field (DAF)</dt>
|
|
<dd>In SNA, a field in a format identification 0 or format identification 1 transmission
|
|
header that contains the network address of the destination. In a format identification
|
|
2 header, the field is called destination address field prime (DAF'). See
|
|
also <a href="rzaato.htm#x2032598">origin address field</a>.</dd>
|
|
<dt id="x2020228" class="bold">
|
|
<a name="x2020228"></a>destination control table (DCT)</dt>
|
|
<dd>A table describing each of the transient data destinations used in CICS. This table
|
|
contains an entry for each extrapartition, intrapartition, and indirect destination.</dd>
|
|
<dt id="x2020233" class="bold">
|
|
<a name="x2020233"></a>destination node</dt>
|
|
<dd>In the OSI Communications
|
|
Subsystem licensed program, a node that is the final recipient of data sent
|
|
by the local node and the origin of data sent to the local node. A destination
|
|
node may or may not be an adjacent node. A destination node may or may not
|
|
be an adjacent node.</dd>
|
|
<dt id="x2020238" class="bold">
|
|
<a name="x2020238"></a>destination NSAP address</dt>
|
|
<dd>In OSI,
|
|
an NSAP address that identifies a destination node.</dd>
|
|
<dt id="x2020243" class="bold">
|
|
<a name="x2020243"></a>destination service access point (DSAP)</dt>
|
|
<dd>(1) In OSI, a service access point used to receive data.</dd>
|
|
<dd>(2) In
|
|
SNA and TCP/IP, a logical address that allows a system to route data from
|
|
a remote device to the appropriate communications support. See also <a href="rzaats.htm#x2039412">source service access point</a>.</dd>
|
|
<dt id="x2020251" class="bold">
|
|
<a name="x2020251"></a>destination system</dt>
|
|
<dd>In SNADS, a system
|
|
that can receive messages, documents or objects.</dd>
|
|
<dt id="x2020256" class="bold">
|
|
<a name="x2020256"></a>destructive data change</dt>
|
|
<dd>An event
|
|
in which data is modified by a change operation in an application or by a
|
|
trigger, and then the data is modified again by other trigger actions within
|
|
the same trigger.</dd>
|
|
<dt id="x2020266" class="bold">
|
|
<a name="x2020266"></a>detach</dt>
|
|
<dd>(1) In a multithreaded environment,
|
|
to mark a thread so that the system reclaims the thread resources when the
|
|
thread ends. If the thread is already ended, the resources are freed immediately.</dd>
|
|
<dd>(2) In cross-site mirroring, to disassociate a mirror copy from the
|
|
production copy to use the mirror copy for a separate operation, such as to
|
|
save data, to run reports, or to perform data mining. Detaching a mirror copy
|
|
suspends geographic mirroring.</dd>
|
|
<dt id="x2235617" class="bold">
|
|
<a name="x2235617"></a>detached copy</dt>
|
|
<dd>The mirror copy of
|
|
an independent disk pool that is disassociated from the production copy in
|
|
a cross-site mirroring (XSM) environment.</dd>
|
|
<dt id="x2020271" class="bold">
|
|
<a name="x2020271"></a>detail calculation</dt>
|
|
<dd>In RPG, specified
|
|
calculation operations that are performed for every record read.</dd>
|
|
<dt id="x2020276" class="bold">
|
|
<a name="x2020276"></a>detail line</dt>
|
|
<dd>In RPG, a detail record
|
|
in an output file.</dd>
|
|
<dt id="x2020281" class="bold">
|
|
<a name="x2020281"></a>detail record</dt>
|
|
<dd>(1) In RPG, an output record
|
|
produced during the detail output operation of the RPG program cycle. See
|
|
also <a href="rzaatt.htm#x2041736">total record</a>.</dd>
|
|
<dd>(2) A record that contains
|
|
the daily activities or transactions of a business. For example, the items
|
|
on a customer order are typically stored in detail records. See also <a href="rzaath.htm#x2024295">header record</a>.</dd>
|
|
<dt id="x2020289" class="bold">
|
|
<a name="x2020289"></a>detail report</dt>
|
|
<dd>In Query, a report
|
|
that contains all the information produced by a query. See also <a href="rzaats.htm#x2040263">summary report</a>.</dd>
|
|
<dt id="x2020294" class="bold">
|
|
<a name="x2020294"></a>details view</dt>
|
|
<dd>A standard contents
|
|
view in which a small icon is combined with text to provide descriptive information
|
|
about an object. The text is arranged in rows and columns so one row is for
|
|
each object and one column is for each type of descriptive information displayed.</dd>
|
|
<dt id="x2020299" class="bold">
|
|
<a name="x2020299"></a>detail time</dt>
|
|
<dd>That part of the RPG
|
|
program cycle in which calculation and output operations are performed for
|
|
each record read. See also <a href="rzaatt.htm#x2041741">total time</a>.</dd>
|
|
<dt id="x2020304" class="bold">
|
|
<a name="x2020304"></a>detected access transmission error in (DTSE in)</dt>
|
|
<dd>In Performance Tools, the number of times the network termination
|
|
1 (NT1) notifies the terminal equipment (TE) of an error in data crossing
|
|
the U interface of the integrated services digital network (ISDN) from the
|
|
line transmission termination (LT) to the NT1. The NT1 reports the errors
|
|
to the TE through the maintenance channel S1.</dd>
|
|
<dt id="x2020309" class="bold">
|
|
<a name="x2020309"></a>detected access transmission error out (DTSE
|
|
out)</dt>
|
|
<dd>In Performance Tools, the number of times the network termination
|
|
1 (NT1) notifies the terminal equipment (TE) of an error in data crossing
|
|
the U interface of the integrated services digital network (ISDN) from the
|
|
NT1 to the line transmission termination (LT). The NT1 reports the errors
|
|
to the TE through the maintenance channel S1.</dd>
|
|
<dt id="x2020314" class="bold">
|
|
<a name="x2020314"></a>determinant</dt>
|
|
<dd>A value resulting from
|
|
a mathematical operation on an array.</dd>
|
|
<dt id="x2020319" class="bold">
|
|
<a name="x2020319"></a>DEVD</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020376">device
|
|
description</a>.</dd>
|
|
<dt id="x2020323" class="bold">
|
|
<a name="x2020323"></a>development folder</dt>
|
|
<dd>In System Manager,
|
|
a folder containing documents for a load that is being developed.</dd>
|
|
<dt id="x2020328" class="bold">
|
|
<a name="x2020328"></a>development group</dt>
|
|
<dd>In the Application
|
|
Development Manager feature of the Application Development ToolSet licensed
|
|
program, a group in the project hierarchy where part development is done.</dd>
|
|
<dt id="x2020333" class="bold">
|
|
<a name="x2020333"></a>development library</dt>
|
|
<dd>In System Manager,
|
|
the library containing all or part of a product that is being developed.</dd>
|
|
<dt id="x2020338" class="bold">
|
|
<a name="x2020338"></a>device</dt>
|
|
<dd>A piece of equipment that
|
|
is used with the computer. A device does not generally interact directly with
|
|
the system, but is controlled by a controller. Devices can be workstations,
|
|
printers, disk drives, tape units, or remote systems.</dd>
|
|
<dt id="x2020346" class="bold">
|
|
<a name="x2020346"></a>device address</dt>
|
|
<dd>A unique identifier
|
|
for each device so it is recognized by the system.</dd>
|
|
<dt id="x2020351" class="bold">
|
|
<a name="x2020351"></a>device attributes feedback area</dt>
|
|
<dd>In the C language, an area that allows a user to obtain information about
|
|
a specific device.</dd>
|
|
<dt id="x2020356" class="bold">
|
|
<a name="x2020356"></a>device class</dt>
|
|
<dd>The generic name for
|
|
a group of device types. For example, all display stations belong to the same
|
|
device class. See also <a href="rzaatd.htm#x2020434">device type</a>.</dd>
|
|
<dt id="x2211109" class="bold">
|
|
<a name="x2211109"></a>device cluster resource group</dt>
|
|
<dd>A cluster
|
|
resource group that contains a list of switchable devices, such as independent
|
|
disk pools which reside on a switchable entity. See also <a href="rzaats.htm#x2210551">switchable entity</a>.</dd>
|
|
<dt id="x2020361" class="bold">
|
|
<a name="x2020361"></a>device configuration</dt>
|
|
<dd>The physical
|
|
placement of display stations, printers, and so forth; and the configuration
|
|
descriptions that describe the physical configuration to the system and describe
|
|
how the configuration will be used by the system.</dd>
|
|
<dt id="x2020366" class="bold">
|
|
<a name="x2020366"></a>device dependence</dt>
|
|
<dd>The reliance on
|
|
the characteristics of particular types of devices used in writing and running
|
|
programs or in performing functions. See also <a href="rzaatd.htm#x2020396">device
|
|
independence</a>.</dd>
|
|
<dt id="x2020371" class="bold">
|
|
<a name="x2020371"></a>device-dependent</dt>
|
|
<dd>Pertaining to a
|
|
function that can be accomplished, or a program that can be run, only if particular
|
|
types of devices are available. See also <a href="rzaatd.htm#x2020401">device-independent</a>.</dd>
|
|
<dt id="x2020376" class="bold">
|
|
<a name="x2020376"></a>device description (DEVD)</dt>
|
|
<dd>An object
|
|
that contains information describing a particular device or logical unit (LU)
|
|
that is attached to the system. A device description is a description of the
|
|
logical connection between two LUs (local and remote locations).</dd>
|
|
<dt id="x2210521" class="bold">
|
|
<a name="x2210521"></a>device domain</dt>
|
|
<dd>A collection of cluster
|
|
nodes that share device resources, such as independent disk pools. For independent
|
|
disk pools, the resources are: virtual addresses, disk pool numbers and disk
|
|
unit numbers. An independent disk pool can only be accessed by the nodes in
|
|
one device domain.</dd>
|
|
<dt id="x2020381" class="bold">
|
|
<a name="x2020381"></a>device driver (DD)</dt>
|
|
<dd>A program that
|
|
provides an interface between a specific device and the application program
|
|
that uses the device.</dd>
|
|
<dt id="x2020386" class="bold">
|
|
<a name="x2020386"></a>device emulation</dt>
|
|
<dd>The programming
|
|
that allows one device to appear to the user or to a system as another device.</dd>
|
|
<dt id="x2020391" class="bold">
|
|
<a name="x2020391"></a>device file</dt>
|
|
<dd>One of several types
|
|
of the system object type *FILE. A device file contains a description of how
|
|
data is to be presented to a program from a device or how data is to be presented
|
|
to the device from the program. Devices can be display stations, printers,
|
|
diskette units, tape units, or remote systems.</dd>
|
|
<dt id="x2020396" class="bold">
|
|
<a name="x2020396"></a>device independence</dt>
|
|
<dd>The capability
|
|
to write and run programs or perform functions without regard for the physical
|
|
characteristics of devices. See also <a href="rzaatd.htm#x2020366">device dependence</a>.</dd>
|
|
<dt id="x2020401" class="bold">
|
|
<a name="x2020401"></a>device-independent</dt>
|
|
<dd>Pertaining to
|
|
a function that can be accomplished, or a program that can be executed, without
|
|
regard for the characteristics of particular types of devices. See also <a href="rzaatd.htm#x2020371">device-dependent</a>.</dd>
|
|
<dt id="x2001517" class="bold">
|
|
<a name="x2001517"></a>device name</dt>
|
|
<dd>The symbolic name of
|
|
an individual device.</dd>
|
|
<dt id="x2020409" class="bold">
|
|
<a name="x2020409"></a>device object</dt>
|
|
<dd>An object that provides
|
|
a means of communication between a computer and another piece of equipment,
|
|
such as a printer or disk drive.</dd>
|
|
<dt id="x2020414" class="bold">
|
|
<a name="x2020414"></a>device parity protection</dt>
|
|
<dd>A function
|
|
that protects data stored on a disk-unit subsystem from being lost because
|
|
of the failure of a single disk unit in the subsystem. When a disk-unit subsystem
|
|
has device parity protection and one of the disk units in the subsystem fails,
|
|
the subsystem continues to run. The disk-unit subsystem reconstructs the data
|
|
after the disk unit is repaired or replaced. See also <a href="rzaatc.htm#x2016712">checksum protection</a>, <a href="rzaatm.htm#x2030442">mirrored protection</a>, <a href="rzaatr.htm#x2036211">Redundant Array of Independent Disks</a>.</dd>
|
|
<dt id="x2020419" class="bold">
|
|
<a name="x2020419"></a>device selection character</dt>
|
|
<dd>In BSC,
|
|
the control character that is sent to a receiving system or to a device connected
|
|
to a receiving system to select that device to receive the output.</dd>
|
|
<dt id="x2020424" class="bold">
|
|
<a name="x2020424"></a>device table</dt>
|
|
<dd>A list of finance devices
|
|
supported by a server to be used by a finance job.</dd>
|
|
<dt id="x2020429" class="bold">
|
|
<a name="x2020429"></a>device token</dt>
|
|
<dd>In the GDDM function, an
|
|
8-byte code, required to set the devices to a predefined set of hardware characteristics.</dd>
|
|
<dt id="x2020434" class="bold">
|
|
<a name="x2020434"></a>device type</dt>
|
|
<dd>The generic name for
|
|
a group of devices. See also <a href="rzaatd.htm#x2020356">device class</a>.</dd>
|
|
<dt id="x2053249" class="bold">
|
|
<a name="x2053249"></a>DFC layer</dt>
|
|
<dd>See <a href="rzaatd.htm#x2140290">data flow control layer</a>.</dd>
|
|
<dt id="x2020439" class="bold">
|
|
<a name="x2020439"></a>DFHAID</dt>
|
|
<dd>A COBOL copybook containing
|
|
the symbolic names for all the AID keys in CICS.</dd>
|
|
<dt id="x2020448" class="bold">
|
|
<a name="x2020448"></a>DFU</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019390">data
|
|
file utility</a>.</dd>
|
|
<dt id="x2020452" class="bold">
|
|
<a name="x2020452"></a>DHCF</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020925">distributed
|
|
host command facility</a>.</dd>
|
|
<dt id="x2020456" class="bold">
|
|
<a name="x2020456"></a>DHCP</dt>
|
|
<dd>See <a href="rzaatd.htm#x2021593">Dynamic
|
|
Host Configuration Protocol</a>.</dd>
|
|
<dt id="x2020460" class="bold">
|
|
<a name="x2020460"></a>DIA</dt>
|
|
<dd>See <a href="rzaatd.htm#x2021133">Document
|
|
Interchange Architecture</a>.</dd>
|
|
<dt id="x2020464" class="bold">
|
|
<a name="x2020464"></a>diacritic</dt>
|
|
<dd>An accent near or through
|
|
a letter or combination of letters indicating a phonetic value different from
|
|
that given the unmarked or otherwise marked letters.</dd>
|
|
<dt id="x2020469" class="bold">
|
|
<a name="x2020469"></a>DIA document distribution service</dt>
|
|
<dd>A service that allows users to send, receive, file, print, change details
|
|
of, and query electronic mail.</dd>
|
|
<dt id="x2020474" class="bold">
|
|
<a name="x2020474"></a>diagnostic</dt>
|
|
<dd>Pertaining to the detection
|
|
and isolation of an error.</dd>
|
|
<dt id="x2020479" class="bold">
|
|
<a name="x2020479"></a>diagnostic message</dt>
|
|
<dd>A message that
|
|
contains information about errors or possible errors. This message is generally
|
|
followed by an escape message.</dd>
|
|
<dt id="x2020484" class="bold">
|
|
<a name="x2020484"></a>dialed number identification service (DNIS)</dt>
|
|
<dd>In telephony, a number supplied by the public telephone network to identify
|
|
a logical called party. For example, two 800 numbers might both be translated
|
|
to a single real telephone number. The DNIS is sent when the real telephone
|
|
number is called to allow end users to distinguish which service is being
|
|
called when a call arrives to the real number.</dd>
|
|
<dt id="x2020489" class="bold">
|
|
<a name="x2020489"></a>dialog</dt>
|
|
<dd>A series of related inquiries
|
|
and responses between a user and an application, similar to a conversation
|
|
between two people.</dd>
|
|
<dt id="x2020494" class="bold">
|
|
<a name="x2020494"></a>dialog box</dt>
|
|
<dd>A secondary window that
|
|
solicits user input for a specific task or subtask. Common examples are the
|
|
Print and Save As dialog boxes. Dialog boxes are modal; that is, they must
|
|
be closed before the user can continue working in the window that launched
|
|
the dialog box.</dd>
|
|
<dt id="x2020499" class="bold">
|
|
<a name="x2020499"></a>dialog management</dt>
|
|
<dd>In OSI, a session-layer
|
|
service that controls which peer application entity has permission to send.</dd>
|
|
<dt id="x2020504" class="bold">
|
|
<a name="x2020504"></a>dialog variable</dt>
|
|
<dd>In the user interface
|
|
manager (UIM), an element in a panel group that is used to pass data values
|
|
between two programs or between a program and a user. The values for all dialog
|
|
variables in a panel group are stored in a variable pool.</dd>
|
|
<dt id="x2020509" class="bold">
|
|
<a name="x2020509"></a>Dial-Up Networking</dt>
|
|
<dd>Microsoft® software
|
|
for Windows® 95 and Windows 98 personal computers that allows
|
|
a modem to dial into a server.</dd>
|
|
<dt id="x2020514" class="bold">
|
|
<a name="x2020514"></a>DIB</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020652">directory
|
|
information base</a>.</dd>
|
|
<dt id="x2020518" class="bold">
|
|
<a name="x2020518"></a>DIF</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019442">data
|
|
interchange format</a>.</dd>
|
|
<dt id="x2020522" class="bold">
|
|
<a name="x2020522"></a>Differentiated Services</dt>
|
|
<dd>A quality-of-service
|
|
standard between two networks that allows hosts to manage data by traffic
|
|
flow.</dd>
|
|
<dt id="x2020527" class="bold">
|
|
<a name="x2020527"></a>Differentiated Services domain</dt>
|
|
<dd>A
|
|
contiguous portion of the Internet over which a consistent set of Differentiated
|
|
Services policies are administered. A Differentiated Services domain can represent
|
|
different trust regions, different network technologies (such as cells or
|
|
frames), different hosts, or even different routers.</dd>
|
|
<dt id="x2020532" class="bold">
|
|
<a name="x2020532"></a>Differentiated Services field</dt>
|
|
<dd>A six-bit
|
|
field in the Internet Protocol (IP) header of a data packet that encodes the
|
|
Differentiated Services code point. The field replaces the IPv4 IP header
|
|
field, which is called type of service (ToS).</dd>
|
|
<dt id="x2020537" class="bold">
|
|
<a name="x2020537"></a>Diffie-Hellman group</dt>
|
|
<dd>A public, key-exchange
|
|
algorithm that is used for securely establishing a shared secret over an insecure
|
|
channel. During Phase II negotiations, the Diffie-Hellman group prevents someone
|
|
who intercepts your key from deducing future keys that are based on the one
|
|
they have.</dd>
|
|
<dt id="x2020546" class="bold">
|
|
<a name="x2020546"></a>digit</dt>
|
|
<dd>Any of the numerals from 0
|
|
through 9.</dd>
|
|
<dt id="x2020551" class="bold">
|
|
<a name="x2020551"></a>digital</dt>
|
|
<dd>Pertaining to data in the
|
|
form of digits. Contrast to analog. See also <a href="rzaata.htm#x2013679">analog</a>.</dd>
|
|
<dt id="x2020556" class="bold">
|
|
<a name="x2020556"></a>digital certificate</dt>
|
|
<dd>An electronic
|
|
document used to identify an individual, server, company, or some other entity,
|
|
and to associate a public key with the entity. A digital certificate is issued
|
|
by a certification authority and is digitally signed by that authority.</dd>
|
|
<dt id="x2020561" class="bold">
|
|
<a name="x2020561"></a>Digital Certificate Manager (DCM)</dt>
|
|
<dd>(1) An i5/OS™ component that allows i5/OS to be a local Certificate Authority (CA),
|
|
to create digital certificates for use by servers or users.</dd>
|
|
<dd>(2) An i5/OS option that registers certificates that are created on the server when
|
|
it is acting as a certificate authority (CA). DCM can also be used to register
|
|
certificates that other certificate authorities issue. DCM allows you to choose
|
|
to associate a user's certificate with its user profile. DCM is also used
|
|
to associate digital certificates with various applications so that these
|
|
applications can use the Secure Sockets Layer (SSL) for secure communications.</dd>
|
|
<dt id="x2020566" class="bold">
|
|
<a name="x2020566"></a>digital data service adapter (DDSA)</dt>
|
|
<dd>In data communications, a device used when sending and receiving data using
|
|
a nonswitched digital data service.</dd>
|
|
<dt id="x2020571" class="bold">
|
|
<a name="x2020571"></a>digital envelope</dt>
|
|
<dd>In the context of
|
|
SET programs, a package of encrypted data and the encryption key.</dd>
|
|
<dt id="x2020576" class="bold">
|
|
<a name="x2020576"></a>digital signature</dt>
|
|
<dd>Information that
|
|
is encrypted with a private key and is appended to a message to assure the
|
|
recipient of the authenticity and integrity of the message. The digital signature
|
|
proves that the message was signed by the entity that owns, or has access
|
|
to, the private key or shared secret symmetric key.</dd>
|
|
<dt id="x2020581" class="bold">
|
|
<a name="x2020581"></a>digital versatile disc</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020585">digital video disc</a>.</dd>
|
|
<dt id="x2020585" class="bold">
|
|
<a name="x2020585"></a>digital video disc (DVD)</dt>
|
|
<dd>An optical
|
|
disc that has the same overall dimensions of a CD-ROM, but has significantly
|
|
higher capacities than a CD-ROM. DVDs are also double sided, whereas CD-ROMs
|
|
are single sided.</dd>
|
|
<dt id="x2020590" class="bold">
|
|
<a name="x2020590"></a>digit position</dt>
|
|
<dd>In COBOL, the amount
|
|
of physical storage required to store a single digit. This amount can vary
|
|
depending on the usage specified in the data description entry that defines
|
|
the data item. If the data description entry specifies that the USAGE IS DISPLAY,
|
|
then a digit position is synonymous with a character position.</dd>
|
|
<dt id="x2001542" class="bold">
|
|
<a name="x2001542"></a>dimension</dt>
|
|
<dd>In System Manager, the
|
|
interfaces that define guidelines, standards, services, and other interfaces
|
|
for integrating systems management applications. Defined interfaces exist
|
|
between each of dimension.</dd>
|
|
<dt id="x2140832" class="bold">
|
|
<a name="x2140832"></a>DIMM</dt>
|
|
<dd>See <a href="rzaatd.htm#x2210722">dual
|
|
inline memory module</a>.</dd>
|
|
<dt id="x2020598" class="bold">
|
|
<a name="x2020598"></a>direct access</dt>
|
|
<dd>A file access method
|
|
allowing reading and writing of records in an arbitrary order.</dd>
|
|
<dt id="x2020603" class="bold">
|
|
<a name="x2020603"></a>directive</dt>
|
|
<dd>(1) A keyword in the startup
|
|
file that identifies one aspect of the configuration. Examples of directives
|
|
are directory, primary, secondary, cache, forwarders, sortlist, $include,
|
|
options, xfrnets, and bogusns.</dd>
|
|
<dd>(2) A statement that is used in the
|
|
configuration file for a web server to define a particular setting for the
|
|
server.</dd>
|
|
<dt id="x2020614" class="bold">
|
|
<a name="x2020614"></a>direct manipulation</dt>
|
|
<dd>The use of a
|
|
pointing device to work with objects, rather than through menus. For example,
|
|
changing the size of a window by dragging one of its edges is direct manipulation.</dd>
|
|
<dt id="x2020619" class="bold">
|
|
<a name="x2020619"></a>direct monitor handler</dt>
|
|
<dd>An exception
|
|
handler that allows the application programmer to directly declare an exception
|
|
monitor around limited high-level language source statements. For ILE C, this
|
|
capability is enabled through the #pragma statement.</dd>
|
|
<dt id="x2001552" class="bold">
|
|
<a name="x2001552"></a>directory</dt>
|
|
<dd>(1) In a hierarchical file
|
|
system, a grouping of related files and directories. A directory may hold
|
|
zero or more entries, which refer to other directories and files.</dd>
|
|
<dd>(2) A type of file that contains the names and controlling information for other
|
|
objects or other directories.</dd>
|
|
<dd>(3) A collection of open systems that
|
|
cooperate to hold a logical database of information about a set of objects
|
|
in the real world.</dd>
|
|
<dd>(4) In OSI, a repository of information about objects.
|
|
As defined in the X.500 directory standards, a directory is both a repository
|
|
of information and the set of services provided to enable its users to access
|
|
the information in the repository.</dd>
|
|
<dt id="x2020642" class="bold">
|
|
<a name="x2020642"></a>directory access protocol (DAP)</dt>
|
|
<dd>In OSI, the X.500 protocol that a directory user agent uses to obtain directory
|
|
information from a remote directory system agent.</dd>
|
|
<dt id="x2020647" class="bold">
|
|
<a name="x2020647"></a>directory entry</dt>
|
|
<dd>A entry in the system
|
|
distribution directory. A directory entry contains information about the user,
|
|
such as user ID and address, system name, profile name, mailing address, and
|
|
telephone number.</dd>
|
|
<dt id="x2020652" class="bold">
|
|
<a name="x2020652"></a>directory information base (DIB)</dt>
|
|
<dd>In OSI, an X.500 term indicating a collection of all directory information
|
|
in a directory system made up of one or more cooperating directory system
|
|
agents.</dd>
|
|
<dt id="x2020657" class="bold">
|
|
<a name="x2020657"></a>directory pointer</dt>
|
|
<dd>In the hierarchical
|
|
file system, the representation of the position of the next directory entry
|
|
to be read.</dd>
|
|
<dt id="x2020662" class="bold">
|
|
<a name="x2020662"></a>directory server</dt>
|
|
<dd>A server that can
|
|
add, delete, change, or search directory information on behalf of a client.
|
|
See also <a href="rzaatd.htm#x2020680">Directory Server</a>.</dd>
|
|
<dt id="x2020680" class="bold">
|
|
<a name="x2020680"></a>Directory Server</dt>
|
|
<dd>A set of i5/OS services that
|
|
support Lightweight Directory Access Protocol (LDAP). These services consist
|
|
of client application programming interfaces (for i5/OS Integrated Language Environment® and Microsoft Windows applications) and an LDAP-enabled
|
|
server (directory server). See also <a href="rzaatd.htm#x2020662">directory server</a>.</dd>
|
|
<dt id="x2020667" class="bold">
|
|
<a name="x2020667"></a>directory service</dt>
|
|
<dd>In OSI, the service
|
|
by which an open system can access directory information. Directory service
|
|
can be provided locally within an open system, or it can be obtained from
|
|
another open system using the directory service protocols defined by ISO/CCITT.
|
|
In OSI Communications Subsystem, directory service is used to obtain the presentation
|
|
address and other attributes of application entities.</dd>
|
|
<dt id="x2020685" class="bold">
|
|
<a name="x2020685"></a>directory shadowing</dt>
|
|
<dd>The capability
|
|
of a system to duplicate Enterprise Address Book (EAB) data from one installation
|
|
of the EAB to another, such that whenever an addition, change, or deletion
|
|
is made to the EAB on a given system, it is available to all EAB installations
|
|
within the network.</dd>
|
|
<dt id="x2020690" class="bold">
|
|
<a name="x2020690"></a>directory system agent (DSA)</dt>
|
|
<dd>In OSI,
|
|
an application process residing in an open system that provides directory
|
|
service to other open systems.</dd>
|
|
<dt id="x2020695" class="bold">
|
|
<a name="x2020695"></a>directory user agent (DUA)</dt>
|
|
<dd>In OSI,
|
|
an application process residing in an open system that serves as the agent
|
|
that obtains directory services for that open system. The agent can obtain
|
|
the services either locally or from a remote directory system agent.</dd>
|
|
<dt id="x2020710" class="bold">
|
|
<a name="x2020710"></a>DISC</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020719">disconnect</a>.</dd>
|
|
<dt id="x2020714" class="bold">
|
|
<a name="x2020714"></a>discipline</dt>
|
|
<dd>In System Manager, a grouping
|
|
of systems management tasks that support an enterprise's information system
|
|
environment. Examples of disciplines are change management and problem management.</dd>
|
|
<dt id="x2020719" class="bold">
|
|
<a name="x2020719"></a>disconnect (DISC)</dt>
|
|
<dd>In communications,
|
|
the transmission control character that is part of the sequence for disconnecting
|
|
a switched line.</dd>
|
|
<dt id="x2020724" class="bold">
|
|
<a name="x2020724"></a>disconnect character</dt>
|
|
<dd>In data communications,
|
|
the part of the BSC transmission control sequence for ending the connection
|
|
on a switched line.</dd>
|
|
<dt id="x2020729" class="bold">
|
|
<a name="x2020729"></a>disconnected mode (DM)</dt>
|
|
<dd>In communications,
|
|
a response from a secondary station indicating that it is logically disconnected
|
|
from the link.</dd>
|
|
<dt id="x2020734" class="bold">
|
|
<a name="x2020734"></a>disconnect timeout</dt>
|
|
<dd>An indication
|
|
that a switched BSC connection was disconnected because there was no activity
|
|
on the connection for a specified length of time.</dd>
|
|
<dt id="x2020739" class="bold">
|
|
<a name="x2020739"></a>discovery</dt>
|
|
<dd>The automatic detection
|
|
of a network topology change, for example, new and deleted nodes or links.</dd>
|
|
<dt id="x2020749" class="bold">
|
|
<a name="x2020749"></a>disk</dt>
|
|
<dd>A storage device that includes
|
|
one or more flat, circular plates with magnetic or optical surfaces on which
|
|
information is stored.</dd>
|
|
<dt id="x2020754" class="bold">
|
|
<a name="x2020754"></a>disk drive</dt>
|
|
<dd>The mechanism used to
|
|
read and write information on a disk.</dd>
|
|
<dt id="x2020759" class="bold">
|
|
<a name="x2020759"></a>disk enclosure</dt>
|
|
<dd>(1) The part of a disk
|
|
unit that contains the read and write heads, the magnetic disks, and the actuators.</dd>
|
|
<dd>(2) A sealed container that holds the read/write head and disk assembly
|
|
within a disk unit.</dd>
|
|
<dt id="x2020764" class="bold">
|
|
<a name="x2020764"></a>diskette</dt>
|
|
<dd>A thin, flexible magnetic
|
|
plate that is permanently sealed in a protective cover. It can be used to
|
|
store information copies from the disk or another diskette.</dd>
|
|
<dt id="x2020774" class="bold">
|
|
<a name="x2020774"></a>diskette file</dt>
|
|
<dd>A device file created
|
|
by the user for a diskette unit.</dd>
|
|
<dt id="x2020779" class="bold">
|
|
<a name="x2020779"></a>diskette unit</dt>
|
|
<dd>A physical enclosure
|
|
containing one or more diskette drives.</dd>
|
|
<dt id="x2020799" class="bold">
|
|
<a name="x2020799"></a>disk operating system (DOS)</dt>
|
|
<dd>An operating
|
|
system for computer systems that use disks and diskettes for auxiliary storage
|
|
of programs and data.</dd>
|
|
<dt id="x2020804" class="bold">
|
|
<a name="x2020804"></a>disk pool</dt>
|
|
<dd>An auxiliary storage pool
|
|
that contains only disk units.</dd>
|
|
<dt id="x2210526" class="bold">
|
|
<a name="x2210526"></a>disk pool group</dt>
|
|
<dd>Made up of a primary
|
|
disk pool and zero or more secondary disk pools, each of which are independent
|
|
in regard to data storage, but combine to act as one entity.</dd>
|
|
<dt id="x2020809" class="bold">
|
|
<a name="x2020809"></a>disk unit</dt>
|
|
<dd>A sealed container that
|
|
holds the read and write heads, the magnetic disks, and the actuators. See
|
|
also <a href="rzaatr.htm#x2035761">random access memory</a>.</dd>
|
|
<dt id="x2230901" class="bold">
|
|
<a name="x2230901"></a>disk unit enclosure</dt>
|
|
<dd>A physical enclosure
|
|
containing one or more disk units.</dd>
|
|
<dt id="x2020814" class="bold">
|
|
<a name="x2020814"></a>displacement</dt>
|
|
<dd>The distance from the
|
|
beginning of a record, block, or segment to the beginning of a particular
|
|
field.</dd>
|
|
<dt id="x2020819" class="bold">
|
|
<a name="x2020819"></a>display attribute</dt>
|
|
<dd>In computer graphics,
|
|
a property that is assigned to a display element, to a display segment, or
|
|
to the complete display image; for example, a bright intensity or particular
|
|
color.</dd>
|
|
<dt id="x2020824" class="bold">
|
|
<a name="x2020824"></a>display file</dt>
|
|
<dd>A device file to support
|
|
a display station.</dd>
|
|
<dt id="x2020829" class="bold">
|
|
<a name="x2020829"></a>display image</dt>
|
|
<dd>In 3270 emulation,
|
|
the x-character block (where x is the maximum number of characters that can
|
|
fit on the display screen, or 1920 for printers) that contains data in the
|
|
sequence in which it would appear on the display screen or the printer. When
|
|
creating the display, the user can specify the display image with or without
|
|
field definitions, such as position, length, and other attributes.</dd>
|
|
<dt id="x2020834" class="bold">
|
|
<a name="x2020834"></a>display layout sheet</dt>
|
|
<dd>In SDA, a form
|
|
used to plan the location of data on the display.</dd>
|
|
<dt id="x2020839" class="bold">
|
|
<a name="x2020839"></a>display point</dt>
|
|
<dd>In the GDDM function, the
|
|
smallest addressable area on the screen, sometimes called a picture element
|
|
(pel), that defines the resolution of the characters or images.</dd>
|
|
<dt id="x2020844" class="bold">
|
|
<a name="x2020844"></a>display screen</dt>
|
|
<dd>See <a href="rzaats.htm#x2065921">screen</a>.</dd>
|
|
<dt id="x2020849" class="bold">
|
|
<a name="x2020849"></a>display session</dt>
|
|
<dd>A PC program that
|
|
allows a personal computer to emulate a display station.</dd>
|
|
<dt id="x2020854" class="bold">
|
|
<a name="x2020854"></a>display station</dt>
|
|
<dd>A device, usually
|
|
equipped with a keyboard and a display device, capable of sending and receiving
|
|
information over a communications line.</dd>
|
|
<dt id="x2020859" class="bold">
|
|
<a name="x2020859"></a>display station pass-through</dt>
|
|
<dd>A communications
|
|
function that allows a user to sign on to one system (either an iSeries server, System/38™, or System/36™) from another system (either an iSeries server, System/38, or System/36) and use that system's programs and data.</dd>
|
|
<dt id="x2020869" class="bold">
|
|
<a name="x2020869"></a>distinguished name</dt>
|
|
<dd>(1) A set of name-value
|
|
pairs (such as CN=person's name and C=country or region) that uniquely identify
|
|
an entity in a digital certificate.</dd>
|
|
<dd>(2) In OSI, a multipart hierarchical
|
|
name that can be used to identify OSI objects globally. The distinguished
|
|
name of an object is formed from the sequence of its relative distinguished
|
|
names (RDNs) and the name of its superior object.</dd>
|
|
<dt id="x2020880" class="bold">
|
|
<a name="x2020880"></a>distributed application</dt>
|
|
<dd>In message
|
|
queuing, a set of application programs that can each be connected to a different
|
|
queue manager, but that collectively comprise a single application.</dd>
|
|
<dt id="x2020885" class="bold">
|
|
<a name="x2020885"></a>distributed computing</dt>
|
|
<dd>See <a href="rzaatn.htm#x2031227">network computing</a>. A type of computing that allows computers with different
|
|
hardware and software to be combined on a network, function as a single computer,
|
|
and share the task of processing application programs.</dd>
|
|
<dt id="x2020890" class="bold">
|
|
<a name="x2020890"></a>distributed data</dt>
|
|
<dd>Data that is stored
|
|
on more than one system and is available to remote users and application programs.</dd>
|
|
<dt id="x2020895" class="bold">
|
|
<a name="x2020895"></a>distributed database</dt>
|
|
<dd>Relational or
|
|
nonrelational data that is spread across more than one database in a network
|
|
of systems and is accessible as if it were in a local database. In a network
|
|
of iSeries servers, a distributed database is always a distributed relational
|
|
database. See also <a href="rzaatd.htm#x2020915">distributed file management</a>.</dd>
|
|
<dt id="x2020900" class="bold">
|
|
<a name="x2020900"></a>distributed data interface (DDI)</dt>
|
|
<dd>An optical fiber-based LAN using the ANSI X3T9.5 standard for a token-passing
|
|
ring MAC protocol and its physical attachments. Stations, concentrators, and
|
|
bridges in a DDI network are physically connected to one or both of a pair
|
|
of counter-rotating rings operating at 100Mbps. The term DDI is used to represent
|
|
all LAN types based on the fiber distributed data interface (FDDI) specifications,
|
|
regardless of the media used (optical fiber, copper, or shielded twisted pair).</dd>
|
|
<dt id="x2020905" class="bold">
|
|
<a name="x2020905"></a>distributed data management (DDM)</dt>
|
|
<dd>A function of the operating system that allows an application program or user
|
|
on one system to use database files stored on remote systems. The systems
|
|
must be connected by a communications network, and the remote systems must
|
|
also be using DDM.</dd>
|
|
<dt id="x2020910" class="bold">
|
|
<a name="x2020910"></a>Distributed Data Management Architecture (DDM
|
|
Architecture)</dt>
|
|
<dd>A connection protocol that enables communication
|
|
between a system that uses distributed file management and a system that uses
|
|
distributed relational database architecture.</dd>
|
|
<dt id="x2020915" class="bold">
|
|
<a name="x2020915"></a>distributed file management</dt>
|
|
<dd>A function
|
|
of the operating system that allows an application program or user on one
|
|
system to use database files stored on remote systems. The systems must be
|
|
connected by a communications network, and the remote systems must also be
|
|
using distributed file management. See also <a href="rzaatd.htm#x2020895">distributed
|
|
database</a>.</dd>
|
|
<dt id="x2020925" class="bold">
|
|
<a name="x2020925"></a>distributed host command facility (DHCF)</dt>
|
|
<dd>A function of the operating system that supports the data link between
|
|
a System/370™ terminal using an iSeries application in an HCF (Host Command
|
|
Facility) environment.</dd>
|
|
<dt id="x2020930" class="bold">
|
|
<a name="x2020930"></a>distributed processing</dt>
|
|
<dd>Processing
|
|
in which resources or functions are dispersed among two or more interconnected
|
|
processors, typically over a network.</dd>
|
|
<dt id="x2020935" class="bold">
|
|
<a name="x2020935"></a>distributed program link (DPL)</dt>
|
|
<dd>A
|
|
function of CICS intersystem communication that enables an application program to
|
|
ship LINK requests to another application program on a different instance
|
|
of CICS.</dd>
|
|
<dt id="x2020940" class="bold">
|
|
<a name="x2020940"></a>Distributed Protocol Interface (DPI®)</dt>
|
|
<dd>An extension to the Simple Network Management Protocol (SNMP) agent that permits
|
|
users to dynamically add, delete, or replace management variables in the local
|
|
Management Information Base (MIB) without requiring recompilation of the SNMP
|
|
agent. The distributed protocol interface is defined in Request for Comments
|
|
(RFC) 1592.</dd>
|
|
<dt id="x2020945" class="bold">
|
|
<a name="x2020945"></a>distributed queue management</dt>
|
|
<dd>In message
|
|
queuing, the setup and control of message channels to queue managers on other
|
|
systems.</dd>
|
|
<dt id="x2001592" class="bold">
|
|
<a name="x2001592"></a>distributed relational database</dt>
|
|
<dd>A database whose tables are stored on different but interconnected computing
|
|
systems.</dd>
|
|
<dt id="x2001597" class="bold">
|
|
<a name="x2001597"></a>Distributed Relational
|
|
Database Architecture™ (DRDA®)</dt>
|
|
<dd>The architecture that defines
|
|
formats and protocols for providing transparent access to remote data. Distributed Relational Database Architecture defines
|
|
two types of functions, the application requester function and the application
|
|
server function.</dd>
|
|
<dt id="x2020961" class="bold">
|
|
<a name="x2020961"></a>distributed systems node executive (DSNX)</dt>
|
|
<dd>A function of the operating system that receives and analyzes requests
|
|
from the NetView® Distribution Manager licensed program on a host system. If the
|
|
request is directed to the system that receives it, the request is processed
|
|
on that system or on a personal computer directly attached to that system.
|
|
If the request is intended for a different system, it is routed toward its
|
|
destination.</dd>
|
|
<dt id="x2020971" class="bold">
|
|
<a name="x2020971"></a>distributed transaction processing (DTP)</dt>
|
|
<dd>A process that enables a CICS transaction to communicate synchronously
|
|
with a transaction running in another instance of CICS.</dd>
|
|
<dt id="x2001607" class="bold">
|
|
<a name="x2001607"></a>distributed unit of work (DUW)</dt>
|
|
<dd>In DB2 UDB
|
|
for iSeries, a method of accessing distributed relational data in which a
|
|
user or application can, within a single unit of work, read and update data
|
|
on multiple database management systems (DBMSs). The user or application directs
|
|
each SQL statement to a particular DBMS for execution at the DBMS. Each SQL
|
|
statement may access only one DBMS.</dd>
|
|
<dt id="x2020984" class="bold">
|
|
<a name="x2020984"></a>distribution catalog</dt>
|
|
<dd>A list of objects,
|
|
with references to their locations and associated object characteristics.</dd>
|
|
<dt id="x2020989" class="bold">
|
|
<a name="x2020989"></a>distribution document</dt>
|
|
<dd>An internal
|
|
document that contains the document content and the document details for a
|
|
distribution, such as a note or document.</dd>
|
|
<dt id="x2020994" class="bold">
|
|
<a name="x2020994"></a>distribution list</dt>
|
|
<dd>A list of system
|
|
distribution directory entries, which allows users to send messages, notes,
|
|
and documents to a group of users in one step.</dd>
|
|
<dt id="x2020999" class="bold">
|
|
<a name="x2020999"></a>distribution media</dt>
|
|
<dd>(1) The medium on
|
|
which the operating system software, a licensed program, or an application
|
|
program is distributed to the user. The distribution medium can be any of
|
|
several different media supported by the hardware, such as streaming cartridge
|
|
tape, 9-track tape, or 3.5-inch diskette.</dd>
|
|
<dd>(2) The media that a central
|
|
site creates and distributes to target systems. See also <a href="rzaati.htm#x2025489">installation media</a>.</dd>
|
|
<dt id="x2021007" class="bold">
|
|
<a name="x2021007"></a>distribution queue</dt>
|
|
<dd>In SNADS, a list
|
|
of documents or mail waiting to be sent to users or libraries on remote systems.</dd>
|
|
<dt id="x2021012" class="bold">
|
|
<a name="x2021012"></a>distribution recipient index</dt>
|
|
<dd>See <a href="rzaatd.htm#x2021016">distribution recipient queue</a>.</dd>
|
|
<dt id="x2021016" class="bold">
|
|
<a name="x2021016"></a>distribution recipient queue</dt>
|
|
<dd>An internal
|
|
object that contains entries for incoming object distributions; incoming document
|
|
distributions, such as files, notes, or messages; outgoing document distributions;
|
|
and error distributions.</dd>
|
|
<dt id="x2021021" class="bold">
|
|
<a name="x2021021"></a>distribution repository</dt>
|
|
<dd>In Managed
|
|
System Services, a staging area for objects that are to be sent or have been
|
|
received. Objects are loaded into the repository to be sent to managed systems
|
|
at a later time.</dd>
|
|
<dt id="x2021026" class="bold">
|
|
<a name="x2021026"></a>distribution requisite fix</dt>
|
|
<dd>A temporary
|
|
solution to or a bypass of a problem that is necessary to provide a complete
|
|
solution to correct a problem. The system allows you to apply the distribution
|
|
requisite fix either before the PTF that needs it, with the PTF that needs
|
|
it, or after the PTF that needs it. See also <a href="rzaatc.htm#x2018687">corequisite
|
|
fix</a>, <a href="rzaatp.htm#x2034332">prerequisite fix</a>.</dd>
|
|
<dt id="x2021031" class="bold">
|
|
<a name="x2021031"></a>distribution service level</dt>
|
|
<dd>In SNADS,
|
|
the combination of priority, capacity, and protection requirements that must
|
|
be satisfied to receive or send a distribution. SNADS has service levels of
|
|
fast, status, data high, and data low. Items with a service level of fast,
|
|
status, or data high are put on the priority queue. Items with a service level
|
|
of data low are put on the normal queue.</dd>
|
|
<dt id="x2021036" class="bold">
|
|
<a name="x2021036"></a>distribution services</dt>
|
|
<dd>The support
|
|
provided by the operating system to receive, forward, and send electronic
|
|
mail in an SNA network.</dd>
|
|
<dt id="x2021046" class="bold">
|
|
<a name="x2021046"></a>distribution tracking object</dt>
|
|
<dd>An internal
|
|
object that is used to control electronic mail.</dd>
|
|
<dt id="x2021051" class="bold">
|
|
<a name="x2021051"></a>division header</dt>
|
|
<dd>In COBOL, the reserved
|
|
words and punctuation that indicate the beginning of one of the four divisions
|
|
of a COBOL program.</dd>
|
|
<dt id="x2009053" class="bold">
|
|
<a name="x2009053"></a>DLC</dt>
|
|
<dd>See <a href="rzaatd.htm#x2083468">data
|
|
link control protocol</a>.</dd>
|
|
<dt id="x2021059" class="bold">
|
|
<a name="x2021059"></a>DLCI</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019483">data
|
|
link connection identifier</a>.</dd>
|
|
<dt id="x2168213" class="bold">
|
|
<a name="x2168213"></a>DLC layer</dt>
|
|
<dd>See <a href="rzaatd.htm#x2140295">data link control layer</a>.</dd>
|
|
<dt id="x2074018" class="bold">
|
|
<a name="x2074018"></a>DLE</dt>
|
|
<dd>See <a href="rzaatd.htm#x2052766">data
|
|
link escape character</a>.</dd>
|
|
<dt id="x2168404" class="bold">
|
|
<a name="x2168404"></a>DLE character</dt>
|
|
<dd>See <a href="rzaatd.htm#x2052766">data link escape character</a>.</dd>
|
|
<dt id="x2021067" class="bold">
|
|
<a name="x2021067"></a>DLL</dt>
|
|
<dd>See <a href="rzaatd.htm#x2053937">dynamic
|
|
link library</a>.</dd>
|
|
<dt id="x2021071" class="bold">
|
|
<a name="x2021071"></a>DLO</dt>
|
|
<dd>See <a href="rzaatd.htm#x2021148">document
|
|
library object</a>.</dd>
|
|
<dt id="x2009057" class="bold">
|
|
<a name="x2009057"></a>DLU</dt>
|
|
<dd>See <a href="rzaatd.htm#x2001482">dependent
|
|
logical unit</a>.</dd>
|
|
<dt id="x2021075" class="bold">
|
|
<a name="x2021075"></a>DLUR</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020121">dependent
|
|
logical unit requester</a>.</dd>
|
|
<dt id="x2021079" class="bold">
|
|
<a name="x2021079"></a>DM</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020729">disconnected
|
|
mode</a>.</dd>
|
|
<dt id="x2021083" class="bold">
|
|
<a name="x2021083"></a>DNIC</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019542">data
|
|
network identification code</a>.</dd>
|
|
<dt id="x2021087" class="bold">
|
|
<a name="x2021087"></a>DNIS</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020484">dialed
|
|
number identification service</a>.</dd>
|
|
<dt id="x2245701" class="bold">
|
|
<a name="x2245701"></a>DNS</dt>
|
|
<dd>See <a href="rzaatd.htm#x2021255">Domain
|
|
Name System</a>.</dd>
|
|
<dt id="x2021093" class="bold">
|
|
<a name="x2021093"></a>DNS domain database file</dt>
|
|
<dd>A configuration
|
|
file that contains information about the domain, such as resource records,
|
|
that a server administers.</dd>
|
|
<dt id="x2021098" class="bold">
|
|
<a name="x2021098"></a>DNS server cache</dt>
|
|
<dd>Periodically updated
|
|
information on a name server that contains data about the domain that the
|
|
name server administers.</dd>
|
|
<dt id="x2021103" class="bold">
|
|
<a name="x2021103"></a>document</dt>
|
|
<dd>Any collection of data stored
|
|
in a document object. A document can contain any type of data. For example,
|
|
the iSeries Access shared folders function can store any data that could
|
|
otherwise be stored in a PC file; a server application can store any data
|
|
into a document by using CL commands, such as FILDOC and RPLDOC. The system-recognized
|
|
identifier for the document object type is *DOC. See also <a href="rzaatd.htm#x2021148">document library object</a>.</dd>
|
|
<dt id="x2021108" class="bold">
|
|
<a name="x2021108"></a>document authority</dt>
|
|
<dd>The definition
|
|
of what actions a user can perform on a document.</dd>
|
|
<dt id="x2021113" class="bold">
|
|
<a name="x2021113"></a>document class</dt>
|
|
<dd>A user-defined character
|
|
string, 1 through 16 characters long, that characterizes a document. It can
|
|
be used to search for a filed document. For example, a document that is a
|
|
memo could have a document class of MEMO; a document that is a report, REPORT.</dd>
|
|
<dt id="x2126660" class="bold">
|
|
<a name="x2126660"></a>Document Content Architecture (DCA)</dt>
|
|
<dd>An architecture that guarantees information integrity for a document being
|
|
interchanged in an office system network. DCA provides the rule for specifying
|
|
form and meaning of a document. It defines revisable form text (changeable)
|
|
and final form text (unchangeable).</dd>
|
|
<dt id="x2243701" class="bold">
|
|
<a name="x2243701"></a>document description</dt>
|
|
<dd>The 1- through
|
|
44-character description of a document, assigned by the user when creating
|
|
or filing the document.</dd>
|
|
<dt id="x2021123" class="bold">
|
|
<a name="x2021123"></a>document detail</dt>
|
|
<dd>Data that describes
|
|
a characteristic of a document. For example, a detail can be document type,
|
|
subject, author, or date created.</dd>
|
|
<dt id="x2021128" class="bold">
|
|
<a name="x2021128"></a>document format</dt>
|
|
<dd>The selected arrangement
|
|
of text for a specific document.</dd>
|
|
<dt id="x2021133" class="bold">
|
|
<a name="x2021133"></a>Document Interchange Architecture (DIA)</dt>
|
|
<dd>The rules and structure for the exchange of information between office
|
|
applications. Document Interchange Architecture includes document library
|
|
services and document distribution services.</dd>
|
|
<dt id="x2021138" class="bold">
|
|
<a name="x2021138"></a>document interchange session</dt>
|
|
<dd>The
|
|
environment that allows office system users and iSeries Access users to request document library
|
|
and distribution services from the host system.</dd>
|
|
<dt id="x2021143" class="bold">
|
|
<a name="x2021143"></a>document library</dt>
|
|
<dd>The entire collection
|
|
of documents and folders on a system.</dd>
|
|
<dt id="x2021148" class="bold">
|
|
<a name="x2021148"></a>document library object (DLO)</dt>
|
|
<dd>Any
|
|
system object that resides in the document library, such as RFT and FFT documents,
|
|
folders, and PC files. See also <a href="rzaatd.htm#x2021103">document</a>.</dd>
|
|
<dt id="x2021153" class="bold">
|
|
<a name="x2021153"></a>document library services</dt>
|
|
<dd>The services
|
|
defined by the Document Interchange Architecture (DIA) to work with objects
|
|
filed in the DIA document library. On the system, it is the support that lets
|
|
users work with the contents of the document library.</dd>
|
|
<dt id="x2021158" class="bold">
|
|
<a name="x2021158"></a>document name</dt>
|
|
<dd>The 1- through 12-character
|
|
name for documents in folders, assigned by the user when creating the document.
|
|
See also <a href="rzaatd.htm#x2021168">document object name</a>.</dd>
|
|
<dt id="x2021163" class="bold">
|
|
<a name="x2021163"></a>document number</dt>
|
|
<dd>The number assigned
|
|
to a printed document when a user files that document. The first two digits
|
|
of the document number are the year, and the last five are in sequence, with
|
|
the most recent documents having the highest number. For example, the fifth
|
|
printed document filed in 1989 would have the number 89-00005.</dd>
|
|
<dt id="x2021168" class="bold">
|
|
<a name="x2021168"></a>document object name</dt>
|
|
<dd>The 10-character
|
|
name of a document assigned by the system when a user files the document.
|
|
See also <a href="rzaatd.htm#x2021158">document name</a>.</dd>
|
|
<dt id="x2021178" class="bold">
|
|
<a name="x2021178"></a>document type definition</dt>
|
|
<dd>The definition
|
|
of a non-Document Interchange Architecture (DIA) document user type that identifies
|
|
the document type number, name, and text associated with the document.</dd>
|
|
<dt id="x2021183" class="bold">
|
|
<a name="x2021183"></a>document type set</dt>
|
|
<dd>A value that allows
|
|
a logical grouping of document type definitions. Document type sets include
|
|
the name and the description. A set can contain one or more document types
|
|
or it can be empty.</dd>
|
|
<dt id="x2021188" class="bold">
|
|
<a name="x2021188"></a>document unit object</dt>
|
|
<dd>An internal
|
|
object that contains the document content and the document details.</dd>
|
|
<dt id="x2021193" class="bold">
|
|
<a name="x2021193"></a>do group</dt>
|
|
<dd>(1) In RPG, a group of calculations
|
|
done one or more times based on the results of comparing factor 1 and factor
|
|
2 of certain calculation operations (for example, DOUxx). A DO operation and
|
|
an END operation are the delimiters for a do group.</dd>
|
|
<dd>(2) A set of commands
|
|
in a control language program defined by a DO command and an ENDDO command
|
|
that is conditionally processed as a group.</dd>
|
|
<dt id="x2021201" class="bold">
|
|
<a name="x2021201"></a>DOI</dt>
|
|
<dd>See <a href="rzaatd.htm#x2021260">Domain
|
|
of Interpretation</a>.</dd>
|
|
<dt id="x2021205" class="bold">
|
|
<a name="x2021205"></a>DO loop</dt>
|
|
<dd>A range of statements run
|
|
repetitively by a DO statement.</dd>
|
|
<dt id="x2021210" class="bold">
|
|
<a name="x2021210"></a>domain</dt>
|
|
<dd>(1) In TCP/IP, a named set of
|
|
hosts. Each domain has authority for the machines within that domain, but
|
|
not for machines in other domains.</dd>
|
|
<dd>(2) In a database, all the possible
|
|
values of an attribute or a data element.</dd>
|
|
<dd>(3) An organization of Notes
|
|
servers and workstations that use a common Public Address Book; for example,
|
|
a company or a group within a company.</dd>
|
|
<dd>(4) A logical grouping of resources
|
|
in a network for the purpose of common management and administration.</dd>
|
|
<dd>(5) In communications, the network resources under control of a particular
|
|
system services control point (SSCP).</dd>
|
|
<dd>(6) A set of servers that allocate
|
|
shared network resources within a single logical system.</dd>
|
|
<dd>(7) A characteristic
|
|
of an object that controls which programs can access the object. See also <a href="rzaatd.htm#x2001627">domain name</a>, <a href="rzaats.htm#x2040625">system domain object</a>, <a href="rzaatu.htm#x2042812">user domain object</a>.</dd>
|
|
<dt id="x2021236" class="bold">
|
|
<a name="x2021236"></a>domain-defined attribute</dt>
|
|
<dd>In OSI X.400,
|
|
an attribute of the X.400 originator/recipient name that permits the iSeries system to
|
|
keep existing addressing conventions. The iSeries system uses the domain-defined attributes
|
|
to carry the user ID and address (the two-part network name used in SNADS).</dd>
|
|
<dt id="x2001627" class="bold">
|
|
<a name="x2001627"></a>domain name</dt>
|
|
<dd>(1) In LAN Server, the name
|
|
representing a set of servers that together comprise a single, logical system.
|
|
See also <a href="rzaatd.htm#x2021210">domain</a>.</dd>
|
|
<dd>(2) In Internet communications,
|
|
a name of a host system. A domain name consists of a sequence of subnames
|
|
that are separated by a delimiter character, for example, www.ibm.com.</dd>
|
|
<dt id="x2001632" class="bold">
|
|
<a name="x2001632"></a>domain name server</dt>
|
|
<dd>In Internet communications,
|
|
a server program that supplies name-to-address conversion by mapping domain
|
|
names to IP addresses.</dd>
|
|
<dt id="x2021250" class="bold">
|
|
<a name="x2021250"></a>domain name space</dt>
|
|
<dd>All of the names
|
|
in the Domain Name System (DNS).</dd>
|
|
<dt id="x2021255" class="bold">
|
|
<a name="x2021255"></a>Domain Name System (DNS)</dt>
|
|
<dd>The distributed
|
|
database system used to map domain names to IP addresses. See also <a href="rzaatd.htm#x2001627">domain name</a>.</dd>
|
|
<dt id="x2021260" class="bold">
|
|
<a name="x2021260"></a>Domain of Interpretation (DOI)</dt>
|
|
<dd>A
|
|
group of related protocols that uses the Internet Security Association and
|
|
Key Management Protocol (ISAKMP) to negotiate Security Associations (SAs).
|
|
A DOI defines payload formats, exchange types, and conventions for naming
|
|
security-relevant information such as security policies and cryptographic
|
|
algorithms and modes.</dd>
|
|
<dt id="x2021265" class="bold">
|
|
<a name="x2021265"></a>Domino connector</dt>
|
|
<dd>A function of
|
|
the HTTP Server for iSeries licensed program that enables Lotus Notes® users
|
|
to access the Internet and to use all of the HTTP Server functions. Specifically,
|
|
a Domino connector enables Lotus Notes users to combine Notes with e-business
|
|
applications.</dd>
|
|
<dt id="x2021270" class="bold">
|
|
<a name="x2021270"></a>Domino Directory</dt>
|
|
<dd>A database that
|
|
provides a domain-wide directory of Domino servers, users, certifiers, foreign
|
|
domains, and groups. It also contains documents that manage server-to-server
|
|
communication and server programs.</dd>
|
|
<dt id="x2021275" class="bold">
|
|
<a name="x2021275"></a>Domino for iSeries</dt>
|
|
<dd>See <a href="rzaatl.htm#x2029314">Lotus Domino for iSeries</a>.</dd>
|
|
<dt id="x2021279" class="bold">
|
|
<a name="x2021279"></a>dormant state</dt>
|
|
<dd>In DB2 UDB for iSeries, the state of a connection when the connection is suspended. While in
|
|
the dormant state, no SQL statements use the connection except for commits
|
|
and rollbacks. See also <a href="rzaatc.htm#x2019010">current state</a>.</dd>
|
|
<dt id="x2021284" class="bold">
|
|
<a name="x2021284"></a>DOS</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020799">disk
|
|
operating system</a>.</dd>
|
|
<dt id="x2021298" class="bold">
|
|
<a name="x2021298"></a>dot matrix</dt>
|
|
<dd>(1) In word processing, a
|
|
pattern of dots used to form characters.</dd>
|
|
<dd>(2) In computer graphics,
|
|
a two-dimensional pattern of dots that are used for designing an image on
|
|
the display.</dd>
|
|
<dt id="x2021306" class="bold">
|
|
<a name="x2021306"></a>dotted decimal notation</dt>
|
|
<dd>The syntactical
|
|
representation for a 32-bit integer that consists of four 8-bit numbers written
|
|
in base 10 and separated by periods (dots). IP addresses are represented in
|
|
dotted decimal notation. See also <a href="rzaato.htm#x2032228">octet</a>.</dd>
|
|
<dt id="x2021311" class="bold">
|
|
<a name="x2021311"></a>double-byte character</dt>
|
|
<dd>An entity that
|
|
requires two character bytes.</dd>
|
|
<dt id="x2001652" class="bold">
|
|
<a name="x2001652"></a>double-byte character set (DBCS)</dt>
|
|
<dd>A set of characters in which each character is represented by two bytes. These
|
|
character sets are commonly used by national languages, such as Japanese and
|
|
Chinese, that have more symbols than can be represented by a single byte.
|
|
See also <a href="rzaats.htm#x2004617">single-byte character set</a>, <a href="rzaatm.htm#x2030744">multibyte character set</a>.</dd>
|
|
<dt id="x2021319" class="bold">
|
|
<a name="x2021319"></a>double-byte coded font (double-byte font)</dt>
|
|
<dd>A font in which the characters are defined by 2 bytes. The first byte
|
|
defines the coded font section; the second byte defines the code point in
|
|
the code page specified for that section.</dd>
|
|
<dt id="x2168610" class="bold">
|
|
<a name="x2168610"></a>double-byte font</dt>
|
|
<dd>See <a href="rzaatd.htm#x2021319">double-byte coded font</a>.</dd>
|
|
<dt id="x2021324" class="bold">
|
|
<a name="x2021324"></a>double-click</dt>
|
|
<dd>To press and release
|
|
a mouse button twice in rapid succession in order to perform an operation.</dd>
|
|
<dt id="x2021329" class="bold">
|
|
<a name="x2021329"></a>double precision</dt>
|
|
<dd>The specification
|
|
that causes a floating-point value to be stored (internally) in the long format
|
|
(two computer words). See also <a href="rzaats.htm#x2039021">single precision</a>.</dd>
|
|
<dt id="x2021334" class="bold">
|
|
<a name="x2021334"></a>downline</dt>
|
|
<dd>Pertaining to devices that
|
|
are below a controller, and controllers that are below a communications line
|
|
in a communications configuration. See also <a href="rzaatu.htm#x2042698">upline</a>.</dd>
|
|
<dt id="x2021339" class="bold">
|
|
<a name="x2021339"></a>download</dt>
|
|
<dd>To transfer data from a
|
|
computer to a connected device, such as a workstation or microcomputer. Typically,
|
|
users download from a larger computer to a diskette or fixed disk on a smaller
|
|
computer or from a system unit to an adapter.</dd>
|
|
<dt id="x2021344" class="bold">
|
|
<a name="x2021344"></a>downstream</dt>
|
|
<dd>Pertaining to the direction
|
|
of data flow, which is toward the destination of a transmission. See also <a href="rzaatu.htm#x2005588">upstream</a>.</dd>
|
|
<dt id="x2021352" class="bold">
|
|
<a name="x2021352"></a>DPI</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020940">Distributed Protocol Interface</a>.</dd>
|
|
<dt id="x2021356" class="bold">
|
|
<a name="x2021356"></a>DPL</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020935">distributed
|
|
program link</a>.</dd>
|
|
<dt id="x2021360" class="bold">
|
|
<a name="x2021360"></a>DR</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020048">definite
|
|
response</a>.</dd>
|
|
<dt id="x2021369" class="bold">
|
|
<a name="x2021369"></a>drag</dt>
|
|
<dd>To use a pointing device to
|
|
move an object. For example, a user can drag a window border to make it larger
|
|
by holding a button pointing device while moving the pointing device.</dd>
|
|
<dt id="x2021379" class="bold">
|
|
<a name="x2021379"></a>drawdown lock</dt>
|
|
<dd>In the Application
|
|
Development Manager feature of the Application Development ToolSet licensed
|
|
program, a group name that shows the group to which a part is checked out.</dd>
|
|
<dt id="x2021384" class="bold">
|
|
<a name="x2021384"></a>drawing character</dt>
|
|
<dd>In iSeries Access, a
|
|
keyboard character that is placed in the cursor position after the cursor
|
|
is moved with the cursor movement key.</dd>
|
|
<dt id="x2009073" class="bold">
|
|
<a name="x2009073"></a>DRDA</dt>
|
|
<dd>See <a href="rzaatd.htm#x2001597">Distributed Relational Database Architecture</a>.</dd>
|
|
<dt id="x2021391" class="bold">
|
|
<a name="x2021391"></a>DRDA1</dt>
|
|
<dd>The first stage of Distributed Relational
|
|
Database Architecture (DRDA). In this stage, an application or user
|
|
on one system can, within a single unit of work, read update data on a single
|
|
DBMS.</dd>
|
|
<dt id="x2021396" class="bold">
|
|
<a name="x2021396"></a>DRDA2</dt>
|
|
<dd>The second stage of Distributed Relational
|
|
Database Architecture (DRDA).</dd>
|
|
<dt id="x2021406" class="bold">
|
|
<a name="x2021406"></a>driver</dt>
|
|
<dd>(1) A circuit that increases the
|
|
signal current for sending data over long cables or to many other circuits.</dd>
|
|
<dd>(2) A program (and possibly data files) that contain information
|
|
needed to run a particular unit, such as a plotter, printer, port, or mouse.</dd>
|
|
<dd>(3) A circuit that sends small electronic signals to a device.</dd>
|
|
<dt id="x2021422" class="bold">
|
|
<a name="x2021422"></a>dropping</dt>
|
|
<dd>In QoS, the simplest form
|
|
of traffic conditioning where noncompliant packets are discarded.</dd>
|
|
<dt id="x2021427" class="bold">
|
|
<a name="x2021427"></a>DSA</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020690">directory
|
|
system agent</a>.</dd>
|
|
<dt id="x2021431" class="bold">
|
|
<a name="x2021431"></a>DSAP</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020243">destination
|
|
service access point</a>.</dd>
|
|
<dt id="x2021440" class="bold">
|
|
<a name="x2021440"></a>DSD</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019904">Dedicated
|
|
Server for Domino</a>.</dd>
|
|
<dt id="x2021444" class="bold">
|
|
<a name="x2021444"></a>DSNX</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020961">distributed
|
|
systems node executive</a>.</dd>
|
|
<dt id="x2021448" class="bold">
|
|
<a name="x2021448"></a>DST</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019909">dedicated
|
|
service tools</a>.</dd>
|
|
<dt id="x2021452" class="bold">
|
|
<a name="x2021452"></a>DST-restricted state</dt>
|
|
<dd>The status of
|
|
the system before an initial program load (IPL) of the operating system is
|
|
performed. Only dedicated service tools functions are allowed when the system
|
|
is in the DST-restricted state.</dd>
|
|
<dt id="x2021457" class="bold">
|
|
<a name="x2021457"></a>DSU</dt>
|
|
<dd>(1) See <a href="rzaatd.htm#x2019342">Data
|
|
Description Specifications Design Utility</a>.</dd>
|
|
<dd>(2) See <a href="rzaatd.htm#x2019585">data service unit</a>.</dd>
|
|
<dt id="x2021465" class="bold">
|
|
<a name="x2021465"></a>DTE</dt>
|
|
<dd>See <a href="rzaatd.htm#x2019606">data
|
|
terminal equipment</a>.</dd>
|
|
<dt id="x2021469" class="bold">
|
|
<a name="x2021469"></a>DTE address</dt>
|
|
<dd>An address that identifies
|
|
a specific line attached to a given node on an X.25 network. DTE addresses
|
|
are assigned by the network supplier.</dd>
|
|
<dt id="x2021474" class="bold">
|
|
<a name="x2021474"></a>DTE attribute</dt>
|
|
<dd>In OSI, an attribute
|
|
specified by the local node to regulate connection requests with an adjacent
|
|
node on an X.25 subnetwork.</dd>
|
|
<dt id="x2021479" class="bold">
|
|
<a name="x2021479"></a>DTP</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020971">distributed
|
|
transaction processing</a>.</dd>
|
|
<dt id="x2191918" class="bold">
|
|
<a name="x2191918"></a>DTSE in</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020304">detected access transmission error in</a>.</dd>
|
|
<dt id="x2021491" class="bold">
|
|
<a name="x2021491"></a>DTS entity</dt>
|
|
<dd>In the DCE Distributed
|
|
Time Service, the server or clerk software on a system.</dd>
|
|
<dt id="x2191920" class="bold">
|
|
<a name="x2191920"></a>DTSE out</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020309">detected access transmission error out</a>.</dd>
|
|
<dt id="x2021500" class="bold">
|
|
<a name="x2021500"></a>DUA</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020695">directory
|
|
user agent</a>.</dd>
|
|
<dt id="x2045803" class="bold">
|
|
<a name="x2045803"></a>dual-homed host</dt>
|
|
<dd>See <a href="rzaatm.htm#x2030759">multihomed host</a>.</dd>
|
|
<dt id="x2210722" class="bold">
|
|
<a name="x2210722"></a>dual inline memory module (DIMM)</dt>
|
|
<dd>A small circuit board with memory-integrated circuits containing signal and
|
|
power pins on both sides of the board. See also <a href="rzaats.htm#x2143756">single
|
|
inline memory module</a>.</dd>
|
|
<dt id="x2021509" class="bold">
|
|
<a name="x2021509"></a>dummy device</dt>
|
|
<dd>In the GDDM function, an
|
|
imaginary output device for which the program does all the normal processing
|
|
but for which no actual output is received.</dd>
|
|
<dt id="x2021514" class="bold">
|
|
<a name="x2021514"></a>dump</dt>
|
|
<dd>(1) Data that is copied in a readable
|
|
format from main or auxiliary storage to an external medium such as tape,
|
|
diskette, or printer.</dd>
|
|
<dd>(2) To record or copy, at a particular instant,
|
|
data from one storage device onto another storage device in order to protect
|
|
the data and debug the program.</dd>
|
|
<dt id="x2021526" class="bold">
|
|
<a name="x2021526"></a>dump media</dt>
|
|
<dd>The diskette or the tape
|
|
to which the user writes the storage dumps.</dd>
|
|
<dt id="x2021531" class="bold">
|
|
<a name="x2021531"></a>duplex</dt>
|
|
<dd>(1) Pertaining to printing on
|
|
both sides of a sheet of paper.</dd>
|
|
<dd>(2) Pertaining to communications in
|
|
which data can be sent and received at the same time. See also <a href="rzaath.htm#x2024148">half-duplex</a>.</dd>
|
|
<dt id="x2021539" class="bold">
|
|
<a name="x2021539"></a>duplicate key value</dt>
|
|
<dd>The occurrence
|
|
of the same value in a key field or in a composite key in more than one record
|
|
in a file.</dd>
|
|
<dt id="x2001688" class="bold">
|
|
<a name="x2001688"></a>duration</dt>
|
|
<dd>(1) In LAN Server, the time
|
|
specified for an alias to exist. An alias can be of either permanent or temporary
|
|
duration. Temporary duration indicates the alias exists only as long as the
|
|
network server is active. Permanent duration indicates the alias exists until
|
|
the administrator deletes it.</dd>
|
|
<dd>(2) In Backup Recovery and Media Services,
|
|
the length of time that the designated media is to reside at a location before
|
|
moving to the next location or returning to the home location. A duration
|
|
is specified in the move policy.</dd>
|
|
<dd>(3) In SQL, a number that represents
|
|
an interval of time.</dd>
|
|
<dt id="x2021553" class="bold">
|
|
<a name="x2021553"></a>DUW</dt>
|
|
<dd>See <a href="rzaatd.htm#x2001607">distributed
|
|
unit of work</a>.</dd>
|
|
<dt id="x2021557" class="bold">
|
|
<a name="x2021557"></a>DVD</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020585">digital
|
|
video disc</a>.</dd>
|
|
<dt id="x2021561" class="bold">
|
|
<a name="x2021561"></a>DWE</dt>
|
|
<dd>See <a href="rzaatd.htm#x2020038">deferred
|
|
work element</a>.</dd>
|
|
<dt id="x2021565" class="bold">
|
|
<a name="x2021565"></a>dynamic</dt>
|
|
<dd>Pertaining to events that
|
|
occur at run time or during processing.</dd>
|
|
<dt id="x2021570" class="bold">
|
|
<a name="x2021570"></a>dynamic access</dt>
|
|
<dd>In COBOL, an access
|
|
method in which specific logical records can be obtained from or placed into
|
|
a mass storage file in a nonsequential manner and obtained from a file in
|
|
a sequential manner during the scope of the same OPEN statement.</dd>
|
|
<dt id="x2001693" class="bold">
|
|
<a name="x2001693"></a>dynamic bind</dt>
|
|
<dd>A process by which SQL
|
|
statements are bound as they are entered. See also <a href="rzaats.htm#x2004833">static bind</a>.</dd>
|
|
<dt id="x2021575" class="bold">
|
|
<a name="x2021575"></a>dynamic connection</dt>
|
|
<dd>A virtual private
|
|
network (VPN) connection that automatically refreshes the keys that keep your
|
|
data secure. A dynamic connection also contains proposals that allow your
|
|
key server to negotiate which parameters to use with the remote key server.
|
|
See also <a href="rzaatm.htm#x2029765">manual connection</a>.</dd>
|
|
<dt id="x2021580" class="bold">
|
|
<a name="x2021580"></a>dynamic data exchange</dt>
|
|
<dd>The exchange
|
|
of data between programs or between a program and a data-file object. Any
|
|
change the user makes to information in one program or session is applied
|
|
to the identical data created by the other program. For example, with the
|
|
DDE feature enabled, the user can select the copy of a spreadsheet that is
|
|
embedded in a report. If the user makes changes to the copy of the spreadsheet
|
|
in the report, the changes are made to the original spreadsheet file.</dd>
|
|
<dt id="x2021593" class="bold">
|
|
<a name="x2021593"></a>Dynamic Host Configuration Protocol (DHCP)</dt>
|
|
<dd>A communications protocol that is used to centrally manage configuration
|
|
information. For example, DHCP automatically assigns IP addresses to computers
|
|
in a network. The Dynamic Host Configuration Protocol is defined by the Internet
|
|
Engineering Task Force (IETF).</dd>
|
|
<dt id="x2021598" class="bold">
|
|
<a name="x2021598"></a>dynamic IP</dt>
|
|
<dd>A method of Internet Protocol
|
|
(IP) address management in which Dynamic Host Configuration Protocol (DHCP)
|
|
assigns IP addresses to hosts and updates the host IP records in the Domain
|
|
Name System (DNS). This method keeps DNS records current as IP address assignments
|
|
change.</dd>
|
|
<dt id="x2021603" class="bold">
|
|
<a name="x2021603"></a>dynamic IP connection</dt>
|
|
<dd>A virtual private
|
|
network (VPN) connection between a local endpoint and a host with a dynamically
|
|
assigned Internet Protocol (IP) address.</dd>
|
|
<dt id="x2053937" class="bold">
|
|
<a name="x2053937"></a>dynamic link library (DLL)</dt>
|
|
<dd>A file
|
|
containing executable code and data bound to a program at load time or run
|
|
time, rather than during linking. The code and data in a dynamic link library
|
|
can be shared by several applications simultaneously.</dd>
|
|
<dt id="x2021613" class="bold">
|
|
<a name="x2021613"></a>dynamic naming</dt>
|
|
<dd>In System Manager,
|
|
the attribute of an application option that specifies whether the option can
|
|
be stored in libraries and folders named at the time the installation is performed.
|
|
This attribute allows an application program to be stored even if a library
|
|
or folder with the same name as one of the application program's primary libraries
|
|
or folders is already on the customer's system, but is used by an application
|
|
program with a different registration identifier.</dd>
|
|
<dt id="x2021618" class="bold">
|
|
<a name="x2021618"></a>dynamic print management</dt>
|
|
<dd>The use
|
|
of the PrintManager™ program to make changes to a print operation
|
|
without interrupting system functions.</dd>
|
|
<dt id="x2021623" class="bold">
|
|
<a name="x2021623"></a>dynamic processing</dt>
|
|
<dd>A method of reading
|
|
from or writing to a file in a nonsequential order (see random processing)
|
|
and reading from a file in a sequential order (see sequential processing)
|
|
with the same OPEN statement.</dd>
|
|
<dt id="x2021628" class="bold">
|
|
<a name="x2021628"></a>dynamic program call</dt>
|
|
<dd>A transfer of
|
|
control from one program or procedure to another program (*PGM) at run time.
|
|
A dynamic program call is the only way that an original program model (OPM)
|
|
program can connect to another OPM program. See also <a href="rzaats.htm#x2039820">static program call</a>.</dd>
|
|
<dt id="x2021633" class="bold">
|
|
<a name="x2021633"></a>dynamic retrieval</dt>
|
|
<dd>A storage management
|
|
operation where selected data is restored back to disk. The retrieval can
|
|
be either from tape to disk or from disk to disk.</dd>
|
|
<dt id="x2021638" class="bold">
|
|
<a name="x2021638"></a>dynamic route</dt>
|
|
<dd>A path that can be
|
|
automatically located from a peer (locally attached) gateway.</dd>
|
|
<dt id="x2021643" class="bold">
|
|
<a name="x2021643"></a>dynamic select/omit</dt>
|
|
<dd>Selection and
|
|
omission of logical file records performed during processing, instead of when
|
|
the access path (if any) is maintained. Dynamic select/omit may also be used
|
|
when no keyed access path exists.</dd>
|
|
<dt id="x2001698" class="bold">
|
|
<a name="x2001698"></a>dynamic SQL</dt>
|
|
<dd>SQL statements that are
|
|
prepared and executed at run time. In dynamic SQL, the SQL statement is contained
|
|
as a character string in a host variable and is not precompiled. See also <a href="rzaats.htm#x2109206">static SQL</a>.</dd>
|
|
<dt id="x2021648" class="bold">
|
|
<a name="x2021648"></a>dynamic storage</dt>
|
|
<dd>An area of storage
|
|
that is explicitly allocated by a program or procedure while it is running.
|
|
See also <a href="rzaata.htm#x2014809">automatic storage</a>, <a href="rzaats.htm#x2039830">static storage</a>.</dd>
|
|
<dt id="x2193701" class="bold">
|
|
<a name="x2193701"></a>dynamic string</dt>
|
|
<dd>See <a href="rzaats.htm#x2004891">string</a>.</dd></dl>
|
|
<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
|
|
</body>
|
|
</html>
|