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EAB: See Enterprise Address Book.
EAO exception: See effective address overflow exception.
EBCDIC: See Extended Binary Coded Decimal Interchange Code.
EBCDIC character: Any one of the symbols included in the 8-bit EBCDIC set.
EBCDIC double-byte encoding scheme: A structure that has separate, allocated coding space for control characters and graphic characters. Control characters do not have 16-bit codes in the EBCDIC structure definition. Graphic characters have a range from 4141 to FEFE. The space character is at 4040.
EBCDIC single-byte encoding scheme: An 8-bit-per-byte structure. The EBCDIC single-byte structure has a valid code-point range for 00 to FF. Control characters have a range from 00 to 3F. Graphic characters have a range from 41 to FE. The space character is 40.
e-business: The transaction of business over an electronic medium such as the Internet.
ECMA: See Ecma International.
Ecma International (ECMA): An international association that is dedicated to the standardization of information and communication systems. The ECMA is based in Europe and was founded in 1961.
e-commerce: The subset of e-business that involves the exchange of money for goods or services purchased over an electronic medium such as the Internet.
ECS: See electronic customer support.
EDF: See execution diagnostic facility.
edge device: A functional unit such as a router or gateway that is deployed at the border of an administrative domain. An edge device controls traffic through one point only.
edit: (1) To add, change, delete, rearrange, or modify the form or format of data.; (2) To change a numeric field for output by suppressing zeros and inserting commas, periods, currency symbols, the sign status, or other constant information.
edit code: A letter or number indicating that editing should be done according to a defined pattern before a field is displayed or printed. See also edit word.
edit description: A description of a user-defined edit code. The system-recognized identifier is *EDTD.
editing character: In COBOL, a single character or a fixed 2-character combination that punctuates output.
edit line: In CoOperative Development Environment/400, a string of characters ended either by an end-of-line character sequence or by the end of the file.
editor program: A computer program designed to perform such functions as rearrangement, modification, and deletion of data in accordance to prescribed rules (A).
edit word: A user-defined word with a specific format that indicates how editing should be done. See also edit code.
effective address overflow exception (EAO exception): In Performance Tools, a condition in which the Licensed Internal Code must make address adjustments not made above the machine interface.
EIA: See Electronic Industries Association.
EIA-232: In data communications, a specification of the Electronic Industries Association (EIA) that defines the interface between data terminal equipment (DTE) and data circuit-terminating equipment (DCE) using serial binary data interchange.
EIA unit: A unit of measure, established by the Electronic Industries Association, equal to 44.45 millimeters (1.75 inches).
EIB: See EXEC interface block.
EJB: See Enterprise JavaBeans™.
electromagnetic compatibility (EMC): The design and test of products to meet legal and corporate specifications dealing with the emissions and susceptibility to frequencies in the radio spectrum. Electromagnetic compatibility is the ability of various electronic equipment to operate properly in the intended electromagnetic environment.
electromagnetic interference (EMI): Waves of electromagnetic radiation, including but not limited to radio frequencies, generated by the flow of electric current.
electronic customer support (ECS): A part of the operating system that allows a customer to access the question-and-answer (Q & A) function; problem analysis, reporting, and management; IBM® product information; and technical information exchange.
electronic document: A document that is stored on the computer, instead of printed on paper.
Electronic Industries Association (EIA): An organization of electronics manufacturers that advances the technological growth of the industry, represents the views of its members, and develops industry standards.
electronic keystick: A device that slides into a slot on some iSeries™ system control panels. When the keystick is in place, it electronically unlocks functions at the key pad on the control panel. This allows a system operator to select an operating mode. When the keystick is removed, those functions are electronically locked, which prevents those without authority from placing the machine in some other mode.
electronic overlay: An AFP™ resource object that is a collection of predefined data, such as lines, shading, text, boxes, or logos, that can be merged with variable data on a page while printing.
electrostatic discharge (ESD): The flow of current that results when objects having a static charge come into close enough proximity to discharge.
element: (1) In AFP Utilities, the smallest unit that is used to design an AFP resource.; (2) The smallest unit in a table, array, list, set, or other structure. For example, a value in a list of values; each data field in an array; each bar or space in a bar code.
elementary item: In COBOL, a data item that cannot be further logically subdivided.
element mark: In AFP Utilities, a mark that is used to show the position of an element on a display; for example, '*B005' where B means bar code and 005 is the fifth element. See also element name.
element name: In AFP Utilities, a name that appears in the image area instead of an element mark. See also element mark.
ELLC: See enhanced logical link control.
e-mail: Documents and messages that are transmitted between users over a communication network.
embedded blank: A space between characters within a unit of data.
embedded command: A command enclosed as a value within another command.
embedded SQL: An SQL statement that is coded within an application program.
EMC: See electromagnetic compatibility.
EMI: See electromagnetic interference.
emitter: A program that takes the output from one system and converts the information into a different form.
emphasis: Highlighting, color change, or other visible indication of conditions relative to an object or choice that affects a user's ability to interact with that object or choice. Emphasis can also give a user additional information about the state of a choice or an object.
emulation: The use of software, hardware, or both by one system to imitate another system. The imitating system accepts the same data, runs the same programs, and achieves the same results as the imitated system.
emulation program: A control program that permits functions written for one system or device to be run on another system or device.
Encapsulated Security Payload (ESP): In a virtual private network (VPN), a security protocol that provides data confidentiality and integrity.
encapsulation: In object-oriented programming, the technique that is used to hide the inherent details of an object, function, or class from client programs. Client programs are only required to know the interface of a class (the signatures of the methods of the class and the names of the attributes of the class) to use the methods and attributes of the class.
encoded format: In query management, the format of the data in an externalized form file.
encoded-vector index: A DB2® UDB for iSeries index that is specialized for quick row selection in query processing. This type of index also provides accurate database statistics, which can improve the optimization of queries. See also radix-tree index.
encoding scheme: (1) The set of rules that specifies the values for control characters and graphic characters. Examples of encoding schemes include ASCII, ISO/IEC 10646, Unicode and IBM's EBCDIC. Encoding schemes are defined by standards organizations.; (2) The underlying part of a code page that defines: a) the coding space (the number and allowable value of code points in a code page); b) the rules for sharing the coding space between control and graphic characters; and c) the rules related to the specific options permitted in that scheme, such as the number of bits in a byte, single-byte, or double-byte.
ENCP: See end-node control point.
encrypt: In Cryptographic Support, to systematically scramble information so that it cannot be read without knowing the coding key. See also decrypt.
encryption: In computer security, the process of transforming data into an unintelligible form in such a way that the original data either cannot be obtained or can be obtained only by using a decryption process.
encryption algorithm: An algorithm that scrambles the data so that it becomes unreadable to someone who intercepts it.
ending attribute character: For a display file, the character following the last position in a field.
end node: In SNA, a node in an APPN network that can be a source or target node, but does not provide any routing or session services to any other node.
end-node control point (ENCP): A control point that provides its own configuration, session, and management services with assistance from the control point in its serving network node. An ENCP is capable of engaging in CP-CP sessions with other nodes.
end-of-file delay: An interval during which the system holds a file open after the normal end of the file is reached until one or more records are updated or added to the end of the file. The length of the interval can be specified on the EOFDLY parameter.
End of Procedure Division: In COBOL, the physical position of a COBOL source program after which no further procedures appear.
end-of-tape marker (EOT marker): A reflective material placed on a magnetic tape to indicate the end of the recording area.
end-of-text character (ETX character): The BSC transmission control character used to end a logical set of records that began with the start-of-text character. See also end-of-transmission-block character.
end-of-transmission-block character (ETB character): The BSC transmission control character used to end a block of records. See also end-of-text character.
end-of-transmission character (EOT character): A transmission control character used to indicate the conclusion of a transmission that may have included one or more texts and any associated message headings.
endpoint: (1) A host or gateway that comprises part of a virtual private network (VPN) connection. A VPN includes two endpoints and a security policy.; (2) The system that is the origin or destination of a session.
endpoint system: Any system that is running i5/OS™ and is connected to the central system. An endpoint system is defined from the central system for the purpose of performing iSeries Navigator functions.
end program header: In COBOL, a combination of words, followed by a separator period, that indicates the end of a COBOL source program. The end program header is: END PROGRAM program-name.
end system: (1) The last system in a chain of systems that are linked by any combination of TELNET and pass-through requests.; (2) See destination node.
end-to-end connection type: In OSI, the type of network service connection used between the local and destination node, that is connection mode, connectionless mode, or both.
eNetwork: See IBM eNetwork Software.
enforced subset match conversion/substitution: A conversion where the characters that exist in both the source coded character set identifier (CCSID) and the target CCSID have their integrity maintained. Characters that are not included in the target CCSID are presented to the user as substitution characters. This substitution is permanent. Any loss of character integrity is permanent. An EBCDIC-encoded character that is in the source CCSID but not in the target CCSID is replaced with 3F.
Enhanced 5250 Emulation: A program that allows a personal computer and a printer to be attached to an iSeries server and perform the functions of one or two 5250 workstations on one twinaxial cable. The workstations can be one display station, two display stations, or one display station and one printer.
enhanced logical link control (ELLC): An X.25 protocol that allows the transfer of data link control information between two adjoining SNA nodes that are connected through an X.25 packet-switching data network. ELLC enhances error detection and recovery. See also physical services header, qualified logical link control.
enhanced NWS: A character-based 5250 workstation with an enhanced character set that allows the presentation of characters that look like graphical symbols.
ENQ character: See enquiry character.
enqueue: To place items in a queue. See also dequeue.
enquiry character (ENQ character): The BSC transmission control character usually used to request a response from the remote system or device.
enroll: In Backup Recovery and Media Services, to identify media to Backup Recovery and Media Services. Media initialized in Backup Recovery and Media Services does not need to be enrolled.
enterprise: The entire business organization under discussion. An enterprise may consist of one or more establishments, divisions, plants, warehouses, and so on that require an information system.
Enterprise Address Book (EAB): A collection of information about people, departments, and locations in an enterprise. Information about people may include telephone numbers, mailing addresses, and the department in which a person works. Department information may include the department name, the manager, and the department name the department reports to. Location information may contain a mailing address. On the iSeries server, the EAB is the system distribution directory.
enterprise information system: In System Manager, all the resources that the applications manage and the functions for managing them.
Enterprise JavaBeans (EJB): A component architecture defined by Sun Microsystems for the development and deployment of object-oriented, distributed, enterprise-level applications.
entity: In OSI, the representation of a layer on a given open system.
entropy: The minimum number of bits needed to represent the information that is contained in a message.
entry: In COBOL, any descriptive set of consecutive clauses stopped by a separator period and written in the Identification Division, Environment Division, or Data Division of a COBOL program.
entry field: An area on a display where a user can enter information, unless the field is read-only. The boundaries of an entry field are usually indicated.
entry format: The description of a personal directory entry. Each personal directory entry has an identical structure. The entry structure determines the type and size of each field in a personal directory entry.
entry point (EP): The address or label of the first instruction processed or entered in a program, routine, or subroutine. A program, routine, or subroutine can have a number of different entry points, each corresponding to a different function or purpose.
enumeration data type: In the Fortran, C, and C++ language, a data type that represents a set of values that a user defines.
envelope: A string of data representing information about a message aside from the attachments and its recipients.
envelope type: A value used to define the format and contents of an envelope, so that the programs that work with specific types of envelopes are supported. The envelope types supported on a system are defined when the mail server framework is configured. The value associated with an envelope type must be a unique type value.
environment clause: In COBOL, a clause that appears as part of an Environment Division entry.
Environment Division: One of the four main parts of a COBOL program. The Environment Division describes the computers on which the source program is compiled and those on which the object program is run; it also provides a connection between the logical concept of files and their records, and the physical characteristics of the devices on which files are stored.
environment variable: A variable that specifies the operating environment for a process. For example, environment variables can describe the home directory, the command search path, the terminal in use, and the current time zone.
EOT character: See end-of-transmission character.
EOT marker: See end-of-tape marker.
EP: (1) See Error Protocol.; (2) See entry point.
equate name: In Interactive Source Debugger, a shorter name assigned to a command that is used often. The equate name, when called, performs the same function as the command.
ER: See exception response.
error log: A record of machine checks, device errors, and media statistics.
Error Protocol (EP): A protocol that provides a means for an Internetwork Packet Exchange (IPX) system to report that is has detected an error, and as a result of that error, the IPX system has discarded an IPX packet.
escape character: The symbol that is used to enclose an SQL delimited identifier. The escape character is the double quotation mark, except in COBOL applications, where the user assigns the symbol, which is either a double quotation mark or an apostrophe.
escape message: A message that reports a condition that caused the program to end before the requested function was complete.
escape sequence: A string of bit combinations that is used to escape from normal data, such as text code points, into control information.
ESD: See electrostatic discharge.
ESP: See Encapsulated Security Payload.
ESS: See IBM TotalStorage® Enterprise Storage Server®.
ETB character: See end-of-transmission-block character.
Ethernet: A packet-based networking technology for local area networks (LANs) that allows multiple access and handles contention by using Carrier Sense Multiple Access with Collision Detection (CSMA/CD) as the access method. Ethernet is standardized in the IEEE 802.3 specification.
ETX character: See end-of-text character.
EUC: See extended UNIX® coded character set.
even positive acknowledgment (ACK0): In BSC, the even-numbered, positive acknowledgment character, which indicates that text was received without transmission errors.
event: (1) An occurrence of significance to a task or system, such as the completion or failure of an operation.; (2) A representation of a change that occurs to a part. The change enables other interested parts to receive notification when something about the part changes. For example, a push button generates an event by signalling that it has been clicked, which may cause another part to display a window.; (3) In OSI, the occurrence of a well-defined situation. Events may be planned (for example, transactions), or they may be spontaneous or unplanned (for example, faults). An agent reports events to its managers.
event action list: In VisualAge® RPG, a list of controls that indicates the action subroutine to be called by the event of each control.
event filter: In OSI, a method for excluding certain types of events so that they are not reported.
event log: A log that contains information about events for a particular system or group, for a particular metric, or for all the events that are associated with a specific monitor.
event report: In OSI, the unsolicited notification of a significant occurrence by an agent to a manager .
events file: In CoOperative Development Environment/400, a machine-readable file, created by a compiler or when the Verify program choice is selected, that contains information about locations of errors in a source file.
EX: See exception response.
exact end position: In RPG, an entry on the output specifications that indicates where the end position of a field or constant is to be placed in the output record. See also relative end position.
exact-name format: In AFP support, a print descriptor naming convention that uses system-specific (actual) group names instead of group alias names.
EXCEPT group name: In RPG, a name used in the place of indicators to identify a record or group of records written at exception output time.
exception: (1) In programming languages, an abnormal situation that may arise during execution, that may cause a deviation from the normal execution sequence, and for which facilities exist in a programming language to define, raise, recognize, ignore, and handle it; for example, (ON-) condition in PL/I, exception in Ada. (I) See also signal.; (2) In VisualAge RPG, an event or situation that prevents, or could prevent, an action requested by a user from being completed in a manner that the user would expect. Exceptions occur when a product is unable to interpret a user's input.
exceptional wait: In Performance Tools, that portion of internal response time that cannot be attributed to the use of the processor and disk. An exceptional wait is caused by contention for internal resources of the system, for example, waiting for a lock on a database record.
exception/error handling: In RPG, user-written code that handles program or file exceptions/errors. If the program or file exceptions/errors are not controlled by the user, the RPG default error handler receives control.
exception handler: A set of routines that responds to an abnormal condition. An exception handler is able to interrupt and to resume the normal running of processes in order to deal with an exception.
exception request (EXR): In SNA, a request that replaces another request in which an error was detected. Note: The exception request contains a 4-byte sense field that identifies the error in the original request and, except if there were some path errors, is sent to the destination of the original request; if possible, the sense data is returned in a negative response to the sender of the original request.
exception response (EX, ER): In SNA, a value in the form-of-response-requested field of the request header that directs the receiver of the request to return a response only if the request is unacceptable as received or if the request cannot be processed; that is, only a negative response can be returned. See also definite response, no response.
exchange log name: A process used when sessions are first established to determine which log is being used by the remote system.
exchange media: The diskette or the tape that the user uses when exchanging data with other systems.
exchange station ID (XID): In communications, a data link command or response for recognizing the primary station and a secondary station.
exclude authority: An object authority that prevents the user from using the object or its contents. See also all authority.
exclusive allow-read lock state: The lock on an object that allows only one job to use the object, but allows other jobs to read the object. The predefined value for this lock state is *EXCLRD.
exclusive lock: A lock that prevents concurrently executing application processes from accessing database data. See also gross lock, shared lock.
exclusive lock state: The lock on an object that allows only one job to use the object; no other job can use the object. The predefined value for this lock state is *EXCL.
exclusive-OR: A logic operator having the property that if P is a binary digit and Q is a binary digit and either P or Q is 1, but not both, then P exclusive-OR Q is 1.
EXEC interface block (EIB): A control block associated with each task in a CICS® command-level environment. The EIB contains information that is useful during the execution of an application program (such as the transaction identifiers) and information that is helpful when a dump is being used to debug a program.
executable statement: An SQL statement that can be embedded in an application program, dynamically prepared and executed, or issued interactively.
execute authority: An object authority that allows the user to run a program or procedure or to search a library or directory.
execution diagnostic facility (EDF): A CICS facility used for testing application programs interactively online, without making any modifications to the source program or to the program preparation procedure. The facility intercepts execution of the program at various points and displays information about the program at these points. Also displayed are any screens sent by the user program, so that the programmer can converse with the application program during testing just as a user would do on the production system.
exit point: A specific point in a system function or program where control may be passed to one or more specified exit programs. See also exit program.
exit point provider: The person responsible for defining the exit point information, defining the format of the data the exit program receives, and calling the exit programs.
exit program: (1) A program to which control is passed from an exit point. See also exit point.; (2) A user-written program that is given control during operation of a system function.
exit status: The return value from a thread. A variable of type void * typically contains a pointer to a control block pointer or a return value that shows under what conditions the thread ended.
expanded communications buffer: A feature of the 3741 device that allows multiple records to be transmitted or received in one block of data.
expanded memory: On most computers, additional memory accessed through an adapter or feature card along with a device driver program. See also conventional memory.
expansion slot: In personal-computer systems, one of several receptacles in the rear panel of the system unit into which a user can install an adapter.
expansion unit: (1) A feature that can be connected to a system unit to provide additional storage and processing capacity.; (2) A feature that contains I/O hardware such as cards, tapes, and disk units. The system may have multiple expansion units. An expansion unit can be bolted directly to the side of a system unit and is contained within the system unit covers. An expansion unit can also be mounted on top of a rack and has its own covers. Internal signal cables interconnect the expansion unit to the system unit or rack.
expedited data: In OSI, a data transfer service provided by the session layer to transfer a small amount of data that is not subject to permission-to-send and flow-control restrictions. The OSI layers attempt to expedite the transfer of such data.
expedited forwarding: A per-hop behavior in the Differentiated Services (DiffServ) standard that is used to create a virtual leased line service.
expert cache: An extension of the storage management function of the i5/OS operating system that allows the single-level storage architecture to take better advantage of the main storage (cache) capacities.
expiration date: (1) The date at which a file is no longer protected against automatic deletion by the system.; (2) The date after which a database file member should not be used.
expired: In Backup Recovery and Media Services, to denote when media is available for a rewrite operation. Media is automatically expired when both the retention period (expiration date) and storage duration have been satisfied.
expired password: A password that has not been changed within 180 days or more.
explicit scope terminator: In COBOL, a reserved word that ends the scope of a particular Procedure Division statement.
exponent: (1) In floating-point format, an integer constant specifying the power of ten by which the base of the decimal floating-point number is to be multiplied.; (2) A number, indicating to which power another number (the base) is to be raised.
exponentiation: The process in which a quantity is raised to a power. In COBOL, exponentiation is indicated with the symbol ** followed by an exponent.
export: (1) An external symbol defined in a module or service program that is available for use by other modules or programs. See also import.; (2) In the Application Development Manager feature of the Application Development ToolSet licensed program, to copy a single part or the components of an application from an Application Development Manager project into a particular i5/OS library.; (3) A function or process that converts an internal file to some standard file format for use outside of an application.; (4) In Network File System (NFS), to make file systems on a server available to remote clients.
exported form: In query management, the source file member that results from running an EXPORT FORM command.
exported query: In query management, the source file member that results from running an EXPORT QUERY command.
exposed name: A correlation name, a table, or a view name specified in a FROM clause for which a correlation name is not defined.
expression: (1) In DDS, a pair of values that represents a single parameter value.; (2) In SQL, a representation of a value by means of variables or constants, sometimes in combination with arithmetic operators.; (3) In REXX, a general means for combining one or more pieces of data in various ways to produce a result, usually different from the original data. Expressions consist of terms (literal strings, function calls, and symbols), and zero or more operators.; (4) In C, a group of constants or variables separated by operators that yields a single value.
EXR: See exception request.
Extended Adaptive Cache: A large high-speed memory that is used exclusively to store user data that would otherwise have been accessed from one or more disks.
Extended Adaptive Cache Simulator: A performance tool that allows system users to assess the benefits of an Extended Adaptive Cache before purchasing one. When the Extended Adaptive Cache simulator is active on a specified storage controller, performance information is generated for a system's actual workload over time.
extended attribute: (1) Information attached to an object that describes the object to an application system or user.; (2) A characteristic of a shared folder file. Each extended attribute consists of a name, a value, and a set of flags.
extended attribute flag: A flag that is stored for the extended attribute, such as the read/write flag.
extended attribute name: The name that identifies the specific extended attribute that is to be stored, changed, or retrieved.
extended attribute subprofile: The interchange document subprofile that contains non-DIA extended attributes for a document.
extended attribute value: The data stored in an extended attribute.
Extended Binary Coded Decimal Interchange Code (EBCDIC): A coded character set of 256 8-bit characters developed for the representation of textual data. EBCDIC is not compatible with ASCII character coding. See also American Standard Code for Information Interchange.
extended character: Double-byte characters that are stored in a DBCS font file, not in the hardware of a DBCS-capable work station. When displaying or printing extended characters, the work station receives them from the DBCS font table under control of the extended character processing function of the operating system. See also basic character.
extended character processing: A function of the operating system that is required to make characters stored in a DBCS font file available to a DBCS-capable work station. Basic characters, which are stored in the work station, do not require extended character processing. Extended characters, which are stored in a DBCS font table, require extended character processing before they can be displayed or printed. See also basic character.
extended help: Online documentation that explains the purpose of the display. Extended help appears if the user presses the Help key when the cursor is outside the areas for which contextual help is available.
extended interface: In query management, the set of language-specific interfaces used to run commands that require access to program variables. The extended interface includes: communications area; command length; command string; number of keywords or variables; array of keyword or variable name lengths; array of keyword or variable names; array of keyword or variable value lengths; array of keyword or variable values; and value type.
extended memory: Personal computer memory that is addressed by DOS, from 1 MB to 16 MB, to increase conventional memory and expanded memory.
extended parameter list: In query management, the arguments of the extended interface that are not defined on the short interface.
extended UNIX coded character set (EUC): A set of characters that contains mixed characters. EUC is the mixture of the ISO 7- or 8-bit code page and up to 3 other code pages that can have characters represented internally in 1 to 3 bytes. Extended UNIX coded character set uses multiple shift-in and shift-out control characters and TCP/IP escape sequences within the data stream to switch between four different character sets.
extend mode: (1) In COBOL, the state of a file after running an OPEN statement, with the EXTEND phrase specified for that file, and before running a CLOSE statement, without the REEL or UNIT phrase specified for that file.; (2) In COBOL, a method of adding records to the end of a sequential file when the file is opened.
Extensible Markup Language (XML): A standard metalanguage for defining markup languages that is based on Standard Generalized Markup Language (SGML). XML simplifies the process of authoring and managing structured information and transmitting and sharing structured information across diverse computing systems.
external data: (1) Data that is exported from one procedure and imported into another procedure. See also internal data.; (2) In COBOL, the data described in a program as external data items and external file connectors.
external data definition: A description of a variable appearing outside a function. It causes the system to allocate storage for that variable and makes that variable accessible to all functions that follow the definition and are located in the same file as the definition.
external data item: In COBOL, a data item that is described as part of an external record in one or more programs of a run unit and which itself may be referred to from any program in which it is described.
external data record: In COBOL, a logical record that is described in one or more programs of a run unit and whose constituent data items may be referred to from any program in which they are described.
external file connector: In COBOL, a file connector that is accessible to one or more programs in the run unit.
external indicator: In RPG, an indicator that can be set by another program before a program is run, or changed by another program while the program is running. Valid external indicators are U1 through U8.
externalized form: In query management, the name of the file resulting from running an EXPORT command against a form.
externalized query: In query management, the name of the form resulting from running an EXPORT command against a query.
externally described data: Data contained in a file for which the fields and the records are described outside of the program (such as with files created by DDS, IDDU, or DB2 UDB for iSeries) that processes the file.
externally described file: A file in which the records and fields are described to the system when the file is created, and used by the program when the file is processed. See also program-described data, program-described file.
external message queue: A message queue used by all programs and procedures running within a job to send and to receive messages outside a job, for example, between an interactive job and the workstation user.
external object: An object that has a defined object type (such as *FILE or *PGM). In general, external objects can be displayed by a user. See also internal object.
external procedure: A procedure that is not contained within a block.
external routine: In REXX, a program external to the user's program, language processor, or both. These routines can be written in any language (including REXX) that supports the system-dependent interfaces used by REXX to start it.
external storage: Data storage not located in main or auxiliary storage, such as tape or diskette.
external switch: In COBOL, a hardware or software device, defined and named by the compiler, that is used to indicate that one of two states exists.
external symbol: (1) An item defined in a high-level language program that represents such things as procedures or variables. Resolving external symbols is the means by which the binder connects modules to form a bound program or a service program.; (2) An entry-point name or external variable that is defined or referred to in a particular module or program.
external system: A system that exists outside a particular network.
external variable: A variable that is outside the lexical scope of the function, procedure, or program that is calling it.
extract service: In OSI, a callable service that obtains optional information from OSI Communications Subsystem. See also action service, set services.
extranet: A private, virtual network that uses access control and security features to restrict the usage of one or more intranets attached to the Internet to selected subscribers (such as personnel from a sponsoring company and its business partners).
extrapartition: In CICS, a type of transient data queue. Extrapartition destinations can be accessed either within the CICS environment or outside of CICS ; they can be defined as either input or output.
EZ-Setup: A wizard that allows user to install iSeries Navigator; set the system name, date, time, and some basic security values, and perform some other tasks.