862 lines
42 KiB
HTML
862 lines
42 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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<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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<title>O</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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<a name="o"></a>
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<h2 id="o">O</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="x2031986" class="bold">
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<a name="x2031986"></a>OAF</dt>
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<dd>See <a href="rzaato.htm#x2032598">origin
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address field</a>.</dd>
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<dt id="x2003409" class="bold">
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<a name="x2003409"></a>object</dt>
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<dd>(1) Any digital content that a
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user can manipulate as a single unit to perform a task. An object can appear
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as text, an icon, or both.</dd>
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<dd>(2) In object-oriented design or programming,
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a concrete realization (instance) of a class that consists of data and the
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operations associated with that data. An object contains the instance data
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that is defined by the class, but the class owns the operations that are associated
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with the data.</dd>
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<dd>(3) A named storage space that consists of a set of
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characteristics that describe the space and, in some cases, data. An object
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is anything that occupies space in storage, can be located in a library or
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directory, can be secured, and on which defined operations can be performed.
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Some examples of objects are programs, files, libraries, and stream files.</dd>
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<dd>(4) Anything that can be created or manipulated with SQL--for example,
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tables, views, indexes, or packages.</dd>
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<dt id="x2032005" class="bold">
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<a name="x2032005"></a>object-action paradigm</dt>
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<dd>In VisualAge® RPG, a
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pattern for interaction in which a user selects an object and then selects
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an action to apply to that object.</dd>
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<dt id="x2032010" class="bold">
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<a name="x2032010"></a>object alter authority</dt>
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<dd>An object
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authority that allows the user to change the attributes of an object, such
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as specifying a trigger for a database file or changing the attributes of
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an SQL package.</dd>
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<dt id="x2032015" class="bold">
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<a name="x2032015"></a>object auditing</dt>
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<dd>A function of the i5/OS™ operating system that creates audit records for specified types of access
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to an object.</dd>
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<dt id="x2032020" class="bold">
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<a name="x2032020"></a>object authority</dt>
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<dd>A specific authority
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that controls what a system user can do with an entire object. For example,
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object authority includes deleting, moving, or renaming an object. There are
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five types of object authorities: object operational, object management, object
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existence, object alter, and object reference.</dd>
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<dt id="x2032025" class="bold">
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<a name="x2032025"></a>object class</dt>
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<dd>(1) In OSI, a way of grouping
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things of the same type, such as by country, region, or application entity.
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A set of common object classes has been defined by the ISO/CCITT directory
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standards.</dd>
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<dd>(2) A categorization or grouping of objects that share
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similar behaviors and circumstances.</dd>
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<dt id="x2032041" class="bold">
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<a name="x2032041"></a>object code</dt>
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<dd>Programming instructions
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that were processed by the compiler into code that can be read by the computer.</dd>
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<dt id="x2032046" class="bold">
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<a name="x2032046"></a>OBJECT-COMPUTER</dt>
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<dd>In COBOL, the name
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of an Environment Division paragraph in which the computer environment, within
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which the program is started, is described.</dd>
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<dt id="x2032051" class="bold">
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<a name="x2032051"></a>object computer entry</dt>
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<dd>In COBOL, an
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entry in the OBJECT-COMPUTER paragraph of the Environment Division that contains
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clauses that describe the computer environment in which the program is to
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be started.</dd>
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<dt id="x2032056" class="bold">
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<a name="x2032056"></a>object decomposition</dt>
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<dd>The process
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of breaking an object into its component parts.</dd>
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<dt id="x2032061" class="bold">
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<a name="x2032061"></a>object definition file (ODF)</dt>
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<dd>In VisualAge RPG, self-contained components that can be shared across applications.</dd>
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<dt id="x2032066" class="bold">
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<a name="x2032066"></a>object definition table (ODT)</dt>
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<dd>A table
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built at compile time by the system to keep track of objects declared in the
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program. The program objects in the table include variables, constants, labels,
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operand lists and exception descriptions. The table resides in the compiled
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program object.</dd>
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<dt id="x2032071" class="bold">
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<a name="x2032071"></a>object description</dt>
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<dd>The characteristics
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(such as name, type, and owner name) that describe an object.</dd>
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<dt id="x2032076" class="bold">
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<a name="x2032076"></a>object descriptor</dt>
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<dd>A data structure
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that identifies a particular WebSphere® MQ object. Included in the descriptor
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are the name of the object and the object type.</dd>
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<dt id="x2032081" class="bold">
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<a name="x2032081"></a>object distribution</dt>
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<dd>A function that
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allows a user to send source and data files, save files, job streams, spooled
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files, and messages to another user, either locally or on an SNADS network.</dd>
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<dt id="x2032091" class="bold">
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<a name="x2032091"></a>object existence authority</dt>
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<dd>An object
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authority that allows the user to delete the object, free storage of the object,
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save and restore the object, transfer ownership of the object, and create
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an object that was named by an authority holder.</dd>
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<dt id="x2032096" class="bold">
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<a name="x2032096"></a>object handle</dt>
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<dd>The identifier or token
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by which a program accesses the WebSphere MQ object with which it is working.</dd>
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<dt id="x2032101" class="bold">
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<a name="x2032101"></a>object hierarchy</dt>
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<dd>A way of illustrating
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relationships among objects. Each object that appears in a level below another
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object is an example of the upper object.</dd>
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<dt id="x2032106" class="bold">
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<a name="x2032106"></a>object ID</dt>
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<dd>An ISO-defined format for
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identifying elements within an OSI network. An object ID consists of a string
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of integers. The integers in the string can identify a particular standards
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body, an enterprise, or the type or value of an object. An object ID is intended
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to be a universal identifier of an object. Examples of values that are specified
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in object ID format are abstract syntaxes, application context names, and
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application process titles.</dd>
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<dt id="x2032111" class="bold">
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<a name="x2032111"></a>object identifier (OID)</dt>
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<dd>A value (distinguishable
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from all other such values) that is associated with an information object.
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It is formally defined in the CCITT X.208 standard.</dd>
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<dt id="x2032116" class="bold">
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<a name="x2032116"></a>object information repository (OIR)</dt>
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<dd>In System Manager, the information about each object that identifies which
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product it is associated with, such as the release level, option, and the
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load identifier.</dd>
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<dt id="x2032121" class="bold">
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<a name="x2032121"></a>object management authority</dt>
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<dd>An object
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authority that allows the user to specify the authority for the object, move
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or rename the object, and add members to database files.</dd>
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<dt id="x2032139" class="bold">
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<a name="x2032139"></a>object of entry</dt>
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<dd>In COBOL, a set of
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operands and reserved words, within a Data Division entry of a COBOL program,
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that immediately follow the subject of the entry.</dd>
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<dt id="x2032144" class="bold">
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<a name="x2032144"></a>object operational authority</dt>
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<dd>An object
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authority that allows the user to look at the description of an object and
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use the object as determined by the user's data authorities to the object.</dd>
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<dt id="x2032149" class="bold">
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<a name="x2032149"></a>object orientation</dt>
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<dd>An orientation
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in which the user works with objects, rather that applications, to perform
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tasks.</dd>
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<dt id="x2032154" class="bold">
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<a name="x2032154"></a>object-oriented programming</dt>
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<dd>A programming
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approach based on the concepts of data abstraction and inheritance. Unlike
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procedural programming techniques, object-oriented programming concentrates
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not on how something is accomplished but instead on what data objects comprise
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the problem and how they are manipulated.</dd>
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<dt id="x2032159" class="bold">
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<a name="x2032159"></a>object-oriented user interface</dt>
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<dd>In VisualAge RPG, a type of user interface that implements the object-action
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paradigm.</dd>
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<dt id="x2032164" class="bold">
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<a name="x2032164"></a>object owner</dt>
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<dd>A user who creates an
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object or to whom the ownership of an object was reassigned. The object owner
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has complete control over the object.</dd>
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<dt id="x2032169" class="bold">
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<a name="x2032169"></a>object program</dt>
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<dd>In the original program
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model (OPM), a set of instructions in machine-readable form. The object program
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is produced by a compiler from a source program. In the Integrated Language Environment® (ILE) model, an object program is the result of binding modules together.</dd>
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<dt id="x2032174" class="bold">
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<a name="x2032174"></a>object reference authority</dt>
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<dd>An object
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authority that allows the user to specify a database file as the first level
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in a referential constraint.</dd>
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<dt id="x2186223" class="bold">
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<a name="x2186223"></a>Object Request Broker (ORB)</dt>
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<dd>In object-oriented
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programming, software that serves as an intermediary by transparently enabling
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objects to exchange requests and responses.</dd>
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<dt id="x2032187" class="bold">
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<a name="x2032187"></a>object subclass</dt>
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<dd>An object created
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from another object and from which the properties of the original object are
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inherited.</dd>
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<dt id="x2032192" class="bold">
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<a name="x2032192"></a>object superclass</dt>
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<dd>The object from
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which subclass objects are created. The properties of the superclass object
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are inherited by the superclass object.</dd>
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<dt id="x2032197" class="bold">
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<a name="x2032197"></a>object time</dt>
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<dd>In COBOL, the time at
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which a program is run.</dd>
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<dt id="x2003425" class="bold">
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<a name="x2003425"></a>object type</dt>
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<dd>In query management,
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the substring following the query command name that specifies the type of
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query object to be processed.</dd>
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<dt id="x2032210" class="bold">
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<a name="x2032210"></a>observability</dt>
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<dd>The property of an
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object, which is derived from data stored with the object, that allows source
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to be retrieved from the object, allows the object to be re-created without
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being recompiled, and allows the object to be symbolically debugged.</dd>
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<dt id="x2032215" class="bold">
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<a name="x2032215"></a>obstruction</dt>
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<dd>An object that prevents
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something from working correctly.</dd>
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<dt id="x2032220" class="bold">
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<a name="x2032220"></a>OCR</dt>
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<dd>(1) See <a href="rzaato.htm#x2032778">overcommitment
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ratio</a>.</dd>
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<dd>(2) See <a href="rzaato.htm#x2132282">optical character recognition</a>.</dd>
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<dt id="x2032228" class="bold">
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<a name="x2032228"></a>octet</dt>
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<dd>A byte composed of eight binary
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elements.</dd>
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<dt id="x2009506" class="bold">
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<a name="x2009506"></a>ODBC</dt>
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<dd>See <a href="rzaato.htm#x2003473">Open
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Database Connectivity</a>.</dd>
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<dt id="x2210854" class="bold">
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<a name="x2210854"></a>odd/even bus pair</dt>
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<dd>An optical link
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card supports a pair of buses; one has an even number and the other has an
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odd number (for example, bus 2 and 3).</dd>
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<dt id="x2032233" class="bold">
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<a name="x2032233"></a>odd positive acknowledgment</dt>
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<dd>See <a href="rzaata.htm#x2012937">ACK1</a>.</dd>
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<dt id="x2032237" class="bold">
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<a name="x2032237"></a>ODF</dt>
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<dd>See <a href="rzaato.htm#x2032061">object
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definition file</a>.</dd>
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<dt id="x2032241" class="bold">
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<a name="x2032241"></a>ODP</dt>
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<dd>See <a href="rzaato.htm#x2032355">open
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data path</a>.</dd>
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<dt id="x2032245" class="bold">
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<a name="x2032245"></a>ODT</dt>
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<dd>See <a href="rzaato.htm#x2032066">object
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definition table</a>.</dd>
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<dt id="x2032249" class="bold">
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<a name="x2032249"></a>OEM</dt>
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<dd>See <a href="rzaato.htm#x2032608">original
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equipment manufacturer</a>.</dd>
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<dt id="x2032253" class="bold">
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<a name="x2032253"></a>offline</dt>
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<dd>Pertaining to the operation
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of a functional unit that is not under the continual control of the system.
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See also <a href="rzaato.htm#x2032326">online</a>.</dd>
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<dt id="x2032258" class="bold">
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<a name="x2032258"></a>offset</dt>
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<dd>(1) The distance from the beginning
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of an object to the beginning of a particular field, or for substring operations,
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the number of character positions from the beginning of a field.</dd>
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<dd>(2) In processing or printing spooled files, the distance (in centimeters or inches)
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from the point of origin or from a specific reference point to the location
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where a finishing operation or a formatting operation starts. Examples of
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offsets include the position of margins or the position of overlays.</dd>
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<dd>(3) In the GDDM® function, the number of character grid units from a reference point.</dd>
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<dt id="x2032269" class="bold">
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<a name="x2032269"></a>offset pie slice</dt>
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<dd>In Business Graphics
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Utility, a slice that is slightly removed from a pie chart to emphasize it.</dd>
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<dt id="x2032274" class="bold">
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<a name="x2032274"></a>offset stacking</dt>
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<dd>A function that allows
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the printed output pages to be offset for easy separation of the print jobs.</dd>
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<dt id="x2032279" class="bold">
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<a name="x2032279"></a>ohm</dt>
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<dd>A unit of measure of electrical
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resistance.</dd>
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<dt id="x2062201" class="bold">
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<a name="x2062201"></a>OID</dt>
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<dd>See <a href="rzaato.htm#x2032111">object
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identifier</a>.</dd>
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<dt id="x2032284" class="bold">
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<a name="x2032284"></a>OIR</dt>
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<dd>See <a href="rzaato.htm#x2032116">object
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information repository</a>.</dd>
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<dt id="x2032302" class="bold">
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<a name="x2032302"></a>omit function</dt>
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<dd>A system function that
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determines which records from a physical file are to be omitted from a logical
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file. See also <a href="rzaats.htm#x2038087">select function</a>.</dd>
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<dt id="x2032307" class="bold">
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<a name="x2032307"></a>OnDemand</dt>
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<dd>A licensed program that
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provides a set of archive features that allows you to store large volumes
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of data or retrieve selected data. This data can be on disk, can be optical,
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or can be on tape storage media. OnDemand provides computer output to laser
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disk and extended archiving functions for a variety of data types.</dd>
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<dt id="x2032312" class="bold">
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<a name="x2032312"></a>one-phase commit</dt>
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<dd>A protocol that
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is used by a sync point manager to commit a transaction when only resources
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that are managed as a single entity are changed during the transaction. For
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example, one-phase commit would be used when a single database on a single
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system is changed. If either the system or communications fail during a one-phase
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commit, the sync point manager may not be informed of whether the changes
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were committed or rolled back.</dd>
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<dt id="x2032317" class="bold">
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<a name="x2032317"></a>one-way hash</dt>
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<dd>(1) In cryptography, pertaining
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to a type of algorithm that can be applied to a buffer of data to produce
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a fixed string of digits. Cryptographic programs often apply one-way hash
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algorithms against a set of data and often compare the results with previously
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generated hash values.</dd>
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<dd>(2) A function that converts a message into
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a fixed string of digits.</dd>
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<dt id="x2032326" class="bold">
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<a name="x2032326"></a>online</dt>
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<dd>Pertaining to the operation
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of a functional unit or device that is under the continual control of the
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system or of a host. See also <a href="rzaato.htm#x2032253">offline</a>.</dd>
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<dt id="x2032331" class="bold">
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<a name="x2032331"></a>online information</dt>
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<dd>Information on
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the display screen that explains displays, messages, and programs.</dd>
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<dt id="x2032336" class="bold">
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<a name="x2032336"></a>online test</dt>
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<dd>A standardized set of
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tests for BSC. The tests are used to ensure the proper operation and correct
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working of the data link (lines and modems) portion of the total system.</dd>
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<dt id="x2032341" class="bold">
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<a name="x2032341"></a>OOB</dt>
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<dd>See <a href="rzaato.htm#x2032717">out-of-band</a>.</dd>
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<dt id="x2032345" class="bold">
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<a name="x2032345"></a>open</dt>
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<dd>To make a file available to
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a program for processing. See also <a href="rzaatc.htm#x2017065">close</a>.</dd>
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<dt id="x2003473" class="bold">
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<a name="x2003473"></a>Open Database Connectivity (ODBC)</dt>
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<dd>An application program interface (API) that allows access to database management
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systems using callable SQL, which does not require the use of an SQL preprocessor.
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The ODBC architecture allows users to add modules, called database drivers,
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that link the application to their choice of database management systems at
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run time. Applications do not need to be linked directly to the modules of
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all the supported database management systems.</dd>
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<dt id="x2032355" class="bold">
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<a name="x2032355"></a>open data path (ODP)</dt>
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<dd>A control block
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created when a file is opened. An ODP contains information about the merged
|
|
file attributes and information returned by input or output operations. The
|
|
ODP only exists while the file is open. See also <a href="rzaats.htm#x2038667">shared
|
|
file</a>.</dd>
|
|
<dt id="x2032360" class="bold">
|
|
<a name="x2032360"></a>open feedback area</dt>
|
|
<dd>In the C language,
|
|
an area containing general information about the opened file, including its
|
|
name, library, and file type. This area also contains specific information
|
|
about the file type, which applicable fields depend on, and about each device
|
|
and communications session defined for the file.</dd>
|
|
<dt id="x2032365" class="bold">
|
|
<a name="x2032365"></a>open mode</dt>
|
|
<dd>In COBOL, the condition
|
|
of a file after the program processes an OPEN statement for that file and
|
|
before the program processes a CLOSE statement for that file. The particular
|
|
open mode is specified in the OPEN statement as either INPUT, OUTPUT, I-O,
|
|
or EXTEND.</dd>
|
|
<dt id="x2032370" class="bold">
|
|
<a name="x2032370"></a>open system</dt>
|
|
<dd>A system whose characteristics
|
|
comply with standards made available throughout the industry and that therefore
|
|
can be connected to other systems complying with the same standards.</dd>
|
|
<dt id="x2032390" class="bold">
|
|
<a name="x2032390"></a>open systems interconnection (OSI)</dt>
|
|
<dd>The interconnection of open systems in accordance with standards of the International
|
|
Organization for Standardization (ISO) for the exchange of information.</dd>
|
|
<dt id="x2158153" class="bold">
|
|
<a name="x2158153"></a>open systems interconnection architecture (OSI
|
|
architecture)</dt>
|
|
<dd>Network architecture that adheres to the particular
|
|
set of ISO standards relating to Open Systems Interconnection.</dd>
|
|
<dt id="x2032385" class="bold">
|
|
<a name="x2032385"></a>open systems interconnection network (OSINET)</dt>
|
|
<dd>A test network sponsored by the National Institute of Standards
|
|
and Technology. The goal of OSINET is to provide a common set of OSI protocols
|
|
that allow all participants to communicate with each other for development
|
|
and research, and for interoperability testing.</dd>
|
|
<dt id="x2158158" class="bold">
|
|
<a name="x2158158"></a>open systems interconnection reference model
|
|
(OSI-RM)</dt>
|
|
<dd>The seven-layer basic reference model that ISO 7498 (CCITT
|
|
X.200) uses to describe how open systems should act and interact. The three
|
|
primary kinds of interactions described in that reference model are the interactions:
|
|
(a) inside layers, (b) between layers, and (c) between open systems.</dd>
|
|
<dt id="x2003478" class="bold">
|
|
<a name="x2003478"></a>operand</dt>
|
|
<dd>An entity on which an operation
|
|
is performed.</dd>
|
|
<dt id="x2032407" class="bold">
|
|
<a name="x2032407"></a>operating diskette</dt>
|
|
<dd>In finance communications,
|
|
the diskette that contains the operating image. The operating diskette is
|
|
used to load the operating image to the main storage of the 4701 Finance Communication
|
|
Controller.</dd>
|
|
<dt id="x2032412" class="bold">
|
|
<a name="x2032412"></a>operating image</dt>
|
|
<dd>In finance communications,
|
|
a collection of the 4701 Finance Communication Controller microcode, user
|
|
system configuration, and user application programs.</dd>
|
|
<dt id="x2032417" class="bold">
|
|
<a name="x2032417"></a>operating system (OS)</dt>
|
|
<dd>A collection
|
|
of system programs that control the overall operation of a computer system.</dd>
|
|
<dt id="x2244302" class="bold">
|
|
<a name="x2244302"></a>Operating System/400® (OS/400®)</dt>
|
|
<dd>Pertaining to the IBM® licensed program that can be used as the operating
|
|
system for iSeries™ servers prior to Version 5 Release 3. See also <a href="rzaati.htm#x2230806">iSeries server</a>, <a href="rzaati.htm#x2391846">i5 server</a>.</dd>
|
|
<dt id="x2032432" class="bold">
|
|
<a name="x2032432"></a>operation</dt>
|
|
<dd>The result of processing
|
|
statements in a high-level language.</dd>
|
|
<dt id="x2032440" class="bold">
|
|
<a name="x2032440"></a>Operational Assistant</dt>
|
|
<dd>A part of the
|
|
operating system that provides a set of menus and displays for end users to
|
|
do commonly performed tasks, such as working with printer output, messages,
|
|
and batch jobs.</dd>
|
|
<dt id="x2032445" class="bold">
|
|
<a name="x2032445"></a>operational descriptor</dt>
|
|
<dd>Information
|
|
about an argument's size, shape, and type, which is passed by the system to
|
|
the called procedure. This information is useful when the called procedure
|
|
cannot precisely anticipate the form of the argument, for example, different
|
|
types of strings.</dd>
|
|
<dt id="x2032450" class="bold">
|
|
<a name="x2032450"></a>operational sign</dt>
|
|
<dd>In COBOL, an algebraic
|
|
sign associated with a numeric data item or a numeric constant that indicates
|
|
whether the item is positive or negative.</dd>
|
|
<dt id="x2032455" class="bold">
|
|
<a name="x2032455"></a>operation code</dt>
|
|
<dd>(1) A code used to represent
|
|
the operations of a computer.</dd>
|
|
<dd>(2) In RPG, a word or abbreviation,
|
|
specified in the calculation specifications, that identifies an operation.</dd>
|
|
<dt id="x2032463" class="bold">
|
|
<a name="x2032463"></a>Operations Console</dt>
|
|
<dd>A feature of iSeries Access for Windows® that provides the ability for an iSeries console to
|
|
be either a local or a remote personal computer. With Operations Console,
|
|
a system administrator, for example, can access the console from home. See
|
|
also <a href="rzaatl.htm#x2028925">local console</a>, <a href="rzaatr.htm#x2036593">remote
|
|
console</a>.</dd>
|
|
<dt id="x2032468" class="bold">
|
|
<a name="x2032468"></a>operations management</dt>
|
|
<dd>In System Manager,
|
|
the discipline that manages the use of systems and resources to support enterprise
|
|
information-processing work loads.</dd>
|
|
<dt id="x2007915" class="bold">
|
|
<a name="x2007915"></a>operator</dt>
|
|
<dd>In the C, COBOL, and REXX
|
|
languages, a token that specifies the type of action to be done on one or
|
|
more terms. The four types of operators are concatenation, arithmetic, comparison,
|
|
and logical.</dd>
|
|
<dt id="x2032481" class="bold">
|
|
<a name="x2032481"></a>operator precedence</dt>
|
|
<dd>In programming
|
|
languages, an order relationship that defines the sequence of the application
|
|
of operators with an expression. (I)</dd>
|
|
<dt id="x2032486" class="bold">
|
|
<a name="x2032486"></a>OPM</dt>
|
|
<dd>See <a href="rzaato.htm#x2032613">original
|
|
program model</a>.</dd>
|
|
<dt id="x2132282" class="bold">
|
|
<a name="x2132282"></a>optical character recognition (OCR)</dt>
|
|
<dd>Character recognition that uses optical means to identify graphic characters.
|
|
(I) (A) See also <a href="rzaatm.htm#x2130910">magnetic ink character recognition</a>.</dd>
|
|
<dt id="x2032490" class="bold">
|
|
<a name="x2032490"></a>optical device</dt>
|
|
<dd>Either a CD-ROM drive,
|
|
a digital video disk (DVD), or both.</dd>
|
|
<dt id="x2032495" class="bold">
|
|
<a name="x2032495"></a>optical disk</dt>
|
|
<dd>A disk that uses laser
|
|
technology for data storage and retrieval.</dd>
|
|
<dt id="x2032503" class="bold">
|
|
<a name="x2032503"></a>optical disk cartridge</dt>
|
|
<dd>A plastic
|
|
case that protects and holds an optical disk, and permits insertion into an
|
|
optical disk drive.</dd>
|
|
<dt id="x2032508" class="bold">
|
|
<a name="x2032508"></a>optical drive</dt>
|
|
<dd>The part used to seek,
|
|
read, and write data on an optical disc. An optical drive may reside in an
|
|
optical library or as a stand-alone unit.</dd>
|
|
<dt id="x2210253" class="bold">
|
|
<a name="x2210253"></a>optical image file</dt>
|
|
<dd>A byte-stream
|
|
file that contains a bit-for-bit mapping of an ISO9660 format CD-ROM or Universal
|
|
Disk Format (UDF) DVD.</dd>
|
|
<dt id="x2032513" class="bold">
|
|
<a name="x2032513"></a>optical library</dt>
|
|
<dd>A set of optical
|
|
disk drives and optical disks defined to a source control data set (SCDS).
|
|
An optical library can be a physical library with the optical drives and optical
|
|
disks residing within the same storage device, or a pseudo library that consists
|
|
of operator-accessible drives and shelf-resident optical disks.</dd>
|
|
<dt id="x2210859" class="bold">
|
|
<a name="x2210859"></a>optical redundancy</dt>
|
|
<dd>A second optical
|
|
path used to keep the system operational when a hardware failure occurs.</dd>
|
|
<dt id="x2032518" class="bold">
|
|
<a name="x2032518"></a>optical scanner</dt>
|
|
<dd>A device that scans
|
|
optically and usually creates an analog or digital signal.</dd>
|
|
<dt id="x2032523" class="bold">
|
|
<a name="x2032523"></a>optical volume</dt>
|
|
<dd>Storage space on an
|
|
optical disk, identified by a volume label.</dd>
|
|
<dt id="x2032528" class="bold">
|
|
<a name="x2032528"></a>optical volume set</dt>
|
|
<dd>Both sides of
|
|
a double-sided volume optical disc containing optically stored data.</dd>
|
|
<dt id="x2032533" class="bold">
|
|
<a name="x2032533"></a>OptiConnect</dt>
|
|
<dd>(1) An iSeries system area
|
|
network (SAN) that allows high-speed links between systems in an iSeries cluster.
|
|
OptiConnect provides three hardware technologies (SPD OptiConnect, high-speed
|
|
link (HSL) OptiConnect, and virtual OptiConnect) that can exist simultaneously
|
|
on a single cluster node.</dd>
|
|
<dd>(2) A feature of the i5/OS operating system
|
|
that allows a user to connect multiple iSeries systems by using SPD bus, high-speed
|
|
link (HSL) loop, or virtual interpartition technologies.</dd>
|
|
<dt id="x2032541" class="bold">
|
|
<a name="x2032541"></a>optimization level</dt>
|
|
<dd>The level of efficiency
|
|
for processing a program, which is determined by the application programmer.
|
|
When the code is optimized on the system, the system uses processing shortcuts
|
|
to reduce the amount of system resources necessary to produce the same output.
|
|
The processing shortcuts are then translated by the system into machine code,
|
|
which allows the program to run more efficiently.</dd>
|
|
<dt id="x2032546" class="bold">
|
|
<a name="x2032546"></a>optimized dialogue transfer</dt>
|
|
<dd>In OSI,
|
|
a quality-of-service value provided by the session layer that enables the
|
|
concatenation of multiple application entity requests--such as data and control
|
|
information requests--when transferring them. The concatenation increases
|
|
data throughput.</dd>
|
|
<dt id="x2032556" class="bold">
|
|
<a name="x2032556"></a>optional file</dt>
|
|
<dd>In COBOL, a file that
|
|
is declared as being not necessarily present each time the program is started.</dd>
|
|
<dt id="x2032561" class="bold">
|
|
<a name="x2032561"></a>optional user facilities</dt>
|
|
<dd>Facilities
|
|
defined within the CCITT Recommendation X.25 that a user of a packet-switching
|
|
data network can request when establishing a virtual circuit.</dd>
|
|
<dt id="x2032566" class="bold">
|
|
<a name="x2032566"></a>optional word</dt>
|
|
<dd>In COBOL, a reserved
|
|
word included in a specific format only to improve the readability of a COBOL
|
|
statement or entry.</dd>
|
|
<dt id="x2032571" class="bold">
|
|
<a name="x2032571"></a>option button</dt>
|
|
<dd>In iSeries Access, a
|
|
circle with associated text that represents a choice. When a user selects
|
|
the choice, a dot appears within the circle. Within a group of related option
|
|
buttons, only one button can be selected.</dd>
|
|
<dt id="x2032576" class="bold">
|
|
<a name="x2032576"></a>option indicator</dt>
|
|
<dd>A 1-character field
|
|
that is passed with an output data record from a program to the system that
|
|
is used to control the output function, such as controlling which fields in
|
|
the record are displayed.</dd>
|
|
<dt id="x2032581" class="bold">
|
|
<a name="x2032581"></a>ORB</dt>
|
|
<dd>See <a href="rzaato.htm#x2186223">Object
|
|
Request Broker</a>.</dd>
|
|
<dt id="x2003493" class="bold">
|
|
<a name="x2003493"></a>ordinary identifier</dt>
|
|
<dd>An uppercase
|
|
letter followed by zero or more characters, each of which is an uppercase
|
|
letter, a number, or the underscore character. An ordinary identifier should
|
|
not be a reserved word. See also <a href="rzaatd.htm#x2001462">delimited identifier</a>.</dd>
|
|
<dt id="x2003501" class="bold">
|
|
<a name="x2003501"></a>ordinary token</dt>
|
|
<dd>In SQL, a numeric
|
|
constant, an ordinary identifier, a host identifier, or a keyword.</dd>
|
|
<dt id="x2032593" class="bold">
|
|
<a name="x2032593"></a>organizational unit</dt>
|
|
<dd>A unit within
|
|
an organization, such as a company, that identifies a particular set of users.</dd>
|
|
<dt id="x2032598" class="bold">
|
|
<a name="x2032598"></a>origin address field (OAF)</dt>
|
|
<dd>In SNA,
|
|
a field in a format identification 0 (or format identification 1) transmission
|
|
header that contains the network address of the originating location. In a
|
|
format identification 2 heading, the field is called origin address field
|
|
prime (OAF'). See also <a href="rzaatd.htm#x2020223">destination address field</a>, <a href="rzaatl.htm#x2029074">local session identification</a>.</dd>
|
|
<dt id="x2032603" class="bold">
|
|
<a name="x2032603"></a>original database</dt>
|
|
<dd>In a remote journal
|
|
network, the data files that reside on a primary system. During normal operations,
|
|
applications make changes to the original database on the primary system.</dd>
|
|
<dt id="x2032608" class="bold">
|
|
<a name="x2032608"></a>original equipment manufacturer (OEM)</dt>
|
|
<dd>A manufacturer of equipment that can be marketed by another manufacturer.</dd>
|
|
<dt id="x2032613" class="bold">
|
|
<a name="x2032613"></a>original program model (OPM)</dt>
|
|
<dd>The
|
|
set of functions for compiling source code and creating high-level language
|
|
programs on the system before the Integrated Language Environment (ILE) model was introduced.</dd>
|
|
<dt id="x2032618" class="bold">
|
|
<a name="x2032618"></a>originator address</dt>
|
|
<dd>A string of data
|
|
representing the address of the originator of the message. The contents and
|
|
format of the string are not defined by the mail server framework. The address
|
|
type associated with the originator address is assumed to define the contents
|
|
of the originator address field.</dd>
|
|
<dt id="x2032623" class="bold">
|
|
<a name="x2032623"></a>originator/recipient name (O/R name)</dt>
|
|
<dd>In OSI X.400, the name of the user (the originator and recipient of messages)
|
|
and other attributes.</dd>
|
|
<dt id="x2032628" class="bold">
|
|
<a name="x2032628"></a>O/R name</dt>
|
|
<dd>See <a href="rzaato.htm#x2032623">originator/recipient name</a>.</dd>
|
|
<dt id="x2032637" class="bold">
|
|
<a name="x2032637"></a>orphaned mutex</dt>
|
|
<dd>A mutual exclusion
|
|
lock that was held by a thread when that thread ended. This makes associated
|
|
application data or thread resources inconsistent.</dd>
|
|
<dt id="x2032642" class="bold">
|
|
<a name="x2032642"></a>OR relationship</dt>
|
|
<dd>The specification
|
|
of conditioning indicators such that the conditioned operation is done when
|
|
any one of the conditions is met.</dd>
|
|
<dt id="x2032647" class="bold">
|
|
<a name="x2032647"></a>OS</dt>
|
|
<dd>See <a href="rzaato.htm#x2032417">operating
|
|
system</a>.</dd>
|
|
<dt id="x2391851" class="bold">
|
|
<a name="x2391851"></a>OS/400</dt>
|
|
<dd>See <a href="rzaato.htm#x2244302">Operating System/400</a>.</dd>
|
|
<dt id="x2032651" class="bold">
|
|
<a name="x2032651"></a>OSI</dt>
|
|
<dd>See <a href="rzaato.htm#x2032390">open
|
|
systems interconnection</a>.</dd>
|
|
<dt id="x2032655" class="bold">
|
|
<a name="x2032655"></a>OSI application</dt>
|
|
<dd>An application that
|
|
communicates over an OSI network.</dd>
|
|
<dt id="x2076301" class="bold">
|
|
<a name="x2076301"></a>OSI architecture</dt>
|
|
<dd>See <a href="rzaato.htm#x2158153">open systems interconnection architecture</a>.</dd>
|
|
<dt id="x2032660" class="bold">
|
|
<a name="x2032660"></a>OSI Communications Subsystem</dt>
|
|
<dd>The IBM licensed
|
|
program that provides communications support for open systems interconnection
|
|
(OSI) on the system.</dd>
|
|
<dt id="x2032665" class="bold">
|
|
<a name="x2032665"></a>OSI File Services</dt>
|
|
<dd>The IBM licensed program
|
|
that provides open systems interconnection (OSI) file transfer, access, and
|
|
management on the system.</dd>
|
|
<dt id="x2032670" class="bold">
|
|
<a name="x2032670"></a>OSI Message Services</dt>
|
|
<dd>The IBM licensed program
|
|
that provides message services (X.400) for open systems interconnection (OSI)
|
|
on the system.</dd>
|
|
<dt id="x2032675" class="bold">
|
|
<a name="x2032675"></a>OSINET</dt>
|
|
<dd>See <a href="rzaato.htm#x2032385">open systems interconnection network</a>.</dd>
|
|
<dt id="x2032679" class="bold">
|
|
<a name="x2032679"></a>OSI network</dt>
|
|
<dd>A data communications
|
|
network that exchanges data according to the OSI protocols.</dd>
|
|
<dt id="x2032684" class="bold">
|
|
<a name="x2032684"></a>OSI protocols</dt>
|
|
<dd>The set of rules for
|
|
exchanging data defined by the ISO in accordance with the OSI reference model.</dd>
|
|
<dt id="x2213608" class="bold">
|
|
<a name="x2213608"></a>OSI-RM</dt>
|
|
<dd>See <a href="rzaato.htm#x2158158">open systems interconnection reference model</a>.</dd>
|
|
<dt id="x2032707" class="bold">
|
|
<a name="x2032707"></a>outbound DTE attribute</dt>
|
|
<dd>In OSI, an
|
|
attributes defined by the local node to regulate communications with an adjacent
|
|
node over an X.25 subnetwork. The attribute affects only the communications
|
|
over the subnetwork between the local and adjacent nodes; it does not regulate
|
|
end-to-end communications.</dd>
|
|
<dt id="x2032712" class="bold">
|
|
<a name="x2032712"></a>outline box</dt>
|
|
<dd>In VisualAge RPG, a
|
|
rectangular box positioned around a group of controls to indicate that all
|
|
the controls are related.</dd>
|
|
<dt id="x2032717" class="bold">
|
|
<a name="x2032717"></a>out-of-band (OOB)</dt>
|
|
<dd>Pertaining to user-specific
|
|
data that has meaning only for connection-oriented (stream) sockets. The server
|
|
generally receives stream data in the same order that it was sent. OOB data
|
|
is received independent of its position in the stream (independent of the
|
|
order in which it was sent).</dd>
|
|
<dt id="x2032722" class="bold">
|
|
<a name="x2032722"></a>output</dt>
|
|
<dd>Information or data received
|
|
from a computer that is shown on a display, printed on the printer, or stored
|
|
on disk, diskette, or tape.</dd>
|
|
<dt id="x2032727" class="bold">
|
|
<a name="x2032727"></a>output field</dt>
|
|
<dd>A field specified in
|
|
a display file, database file, printer file, or ICF file that is reserved
|
|
for the information processed by a program. See also <a href="rzaati.htm#x2025367">input field</a>.</dd>
|
|
<dt id="x2003524" class="bold">
|
|
<a name="x2003524"></a>output file</dt>
|
|
<dd>(1) In COBOL, a file that
|
|
is opened in either the output mode or extend mode.</dd>
|
|
<dd>(2) A database
|
|
or device file that is opened with the option to allow records to be written.</dd>
|
|
<dt id="x2032738" class="bold">
|
|
<a name="x2032738"></a>output indicator</dt>
|
|
<dd>In RPG, an indicator
|
|
used to define the conditions under which an output record or an output field
|
|
in the output specifications is written. An output indicator must be previously
|
|
defined before it is used in the output specifications.</dd>
|
|
<dt id="x2032743" class="bold">
|
|
<a name="x2032743"></a>output/input field</dt>
|
|
<dd>A field specified
|
|
in a database, display, or ICF file that can be used for both the information
|
|
supplied to the program and the information received from the program during
|
|
processing.</dd>
|
|
<dt id="x2032748" class="bold">
|
|
<a name="x2032748"></a>output mode</dt>
|
|
<dd>In COBOL, the state of
|
|
a file after running an OPEN statement, with the OUTPUT or EXTEND phrase specified
|
|
for that file, and before running a CLOSE statement, without the REEL or UNIT
|
|
phrase specified for that file.</dd>
|
|
<dt id="x2032753" class="bold">
|
|
<a name="x2032753"></a>output PIN-protection key</dt>
|
|
<dd>In Cryptographic
|
|
Support, a key encrypting key used to encrypt a PIN before it is sent to another
|
|
location.</dd>
|
|
<dt id="x2032758" class="bold">
|
|
<a name="x2032758"></a>output procedure</dt>
|
|
<dd>In COBOL, a set
|
|
of statements to which control is given during the running of a SORT statement
|
|
after the sort function is completed, or during the running of a MERGE statement
|
|
after the merge function reaches a point at which it can select the next record
|
|
in merged order when requested.</dd>
|
|
<dt id="x2032763" class="bold">
|
|
<a name="x2032763"></a>output queue</dt>
|
|
<dd>An object that contains
|
|
a list of spooled files to be written to an output device, such as a printer
|
|
or a diskette. The system-recognized identifier for the object type is *OUTQ.</dd>
|
|
<dt id="x2032768" class="bold">
|
|
<a name="x2032768"></a>output specifications</dt>
|
|
<dd>In RPG, the
|
|
means by which the programmer describes the output records and their fields
|
|
or adds RPG functions to an externally described output file.</dd>
|
|
<dt id="x2032773" class="bold">
|
|
<a name="x2032773"></a>output stream</dt>
|
|
<dd>In RJE, data received
|
|
from the host system to the attached devices (for example, control characters,
|
|
data files, and messages). See also <a href="rzaati.htm#x2025438">input stream</a>.</dd>
|
|
<dt id="x2032778" class="bold">
|
|
<a name="x2032778"></a>overcommitment ratio (OCR)</dt>
|
|
<dd>The ratio
|
|
of the number of active users and the amount of main storage they use to the
|
|
size of the interactive main storage pool.</dd>
|
|
<dt id="x2032783" class="bold">
|
|
<a name="x2032783"></a>overflow</dt>
|
|
<dd>(1) The condition that occurs
|
|
when the last line specified as the overflow line to be printed on a page
|
|
has been passed.</dd>
|
|
<dd>(2) A condition that occurs when a portion of the
|
|
result of an operation exceeds the capacity of the intended unit of storage.</dd>
|
|
<dt id="x2032791" class="bold">
|
|
<a name="x2032791"></a>overflow indicator</dt>
|
|
<dd>In RPG, an indicator
|
|
that signals when the overflow line on a page has been printed or passed.
|
|
The indicator (OV and OA through OF) can be used to specify which lines are
|
|
to be printed on the next page.</dd>
|
|
<dt id="x2032796" class="bold">
|
|
<a name="x2032796"></a>overhead</dt>
|
|
<dd>The operating system activity
|
|
required to perform a task.</dd>
|
|
<dt id="x2032801" class="bold">
|
|
<a name="x2032801"></a>overlapping fields</dt>
|
|
<dd>Fields in the
|
|
same display or printer record that occupy the same positions on the display
|
|
or page. Option indicators can be used to select which of the overlapping
|
|
fields is to be displayed or printed.</dd>
|
|
<dt id="x2032806" class="bold">
|
|
<a name="x2032806"></a>overlay</dt>
|
|
<dd>(1) To write over (and therefore
|
|
destroy) an existing file.</dd>
|
|
<dd>(2) A program segment that is loaded into
|
|
main storage and replaces all or part of a previously loaded program segment.</dd>
|
|
<dd>(3) In Performance Tools, a graph that is placed on top of another
|
|
graph so that a user can view both graphs at the same time.</dd>
|
|
<dt id="x2298962" class="bold">
|
|
<a name="x2298962"></a>Overlay Utility</dt>
|
|
<dd>In AFP™ Utilities, an
|
|
interactive tool that allows the user to create an overlay.</dd>
|
|
<dt id="x2032826" class="bold">
|
|
<a name="x2032826"></a>overprovisioning</dt>
|
|
<dd>A way to address
|
|
current limitations of best-effort networks by allowing for more bandwidth
|
|
than expected network peak requirements. Overprovisioning increases the probability,
|
|
but does not guarantee the quality, of the transmission of time-sensitive
|
|
and bandwidth-intensive applications.</dd>
|
|
<dt id="x2032831" class="bold">
|
|
<a name="x2032831"></a>override</dt>
|
|
<dd>(1) The attributes specified
|
|
at run time that change the attributes specified in the file description or
|
|
in the program.</dd>
|
|
<dd>(2) In object-oriented programming, to define a new
|
|
class behavior by changing a method inherited from a parent class.</dd>
|
|
<dd>(3) To specify attributes at run time that change the attributes specified
|
|
in the file description or in the program.</dd>
|
|
<dt id="x2032843" class="bold">
|
|
<a name="x2032843"></a>overrun</dt>
|
|
<dd>The loss of data because
|
|
a receiving device is unable to accept data at the rate it is transmitted.</dd>
|
|
<dt id="x2032848" class="bold">
|
|
<a name="x2032848"></a>overstrike</dt>
|
|
<dd>Pertaining to a character
|
|
or symbol that occupies the same space as another character or symbol.</dd>
|
|
<dt id="x2032853" class="bold">
|
|
<a name="x2032853"></a>owner</dt>
|
|
<dd>The user who creates an object
|
|
(or is named the owner of an object).</dd>
|
|
<dt id="x2032858" class="bold">
|
|
<a name="x2032858"></a>owner authority</dt>
|
|
<dd>The authority that
|
|
the object's owner has to the object. See also <a href="rzaatp.htm#x2034470">primary
|
|
group authority</a>, <a href="rzaatp.htm#x2034691">private authority</a>, <a href="rzaatp.htm#x2003950">public authority</a>.</dd></dl>
|
|
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|
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