◄ BACK NEXT ►

E1
A digital trunking facility standard used in Europe and elsewhere, capable of transmitting and receiving 30 digitized voice or data channels. Two additional channels are used for synchronization, framing, and signaling. The transmission rate is 2048 kilobits per second. See also T1.

EAB
See Enterprise Address Book.

EA-enabled table space
In DB2 Universal Database for z/OS and OS/390, a table space or index space that is enabled for extended addressability and that contains individual partitions (or pieces, for LOB table spaces) that are greater than 4 gigabytes.

E and M
A channel associated signaling protocol in which signaling is done using two leads: an M-lead that transmits battery or ground and an E-lead that receives open or ground.

EAO exception
See effective address overflow exception.

EAR
See enterprise archive.

EAR project
See enterprise application project.

eavesdropping
A breach of communication security in which the information remains intact, but its privacy is compromised. See also impersonation, tampering.

Eb
See exabit.

EB
See exabyte.

EBA (EBA)
(1) A term used to identify the netting payment system maintained by the Euro Banking Association.
(2) Abbreviation for Euro Banking Association, which is an association of banks that manages the EBA clearing system through ABE Clearing SAS. The EBA is connected to the S.W.I.F.T. network in a manner similar to other S.W.I.F.T. users. The EBA monitors the operations of the EBA Clearing Service (a netting payment system), in particular the positions of all the clearing banks, through a direct connection to the clearing computer.

ebAF
See Application Framework for e-business.

eBAF
See Application Framework for e-business.

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.

e-business connector
Software programs that connect a Web application or browser to an existing business application or data. Key considerations include performance and security.

ECB
See event control block.

ECC
See error correction code.

ECDSA
See extended CICS dynamic storage area.

echo cancelation
A filter algorithm that is used to compare a copy of the voice data being sent to a caller with the voice data being received from the caller. Any echo of the sent data is removed before the received data is sent on, for example, to a speech recognizer.

ECI
See external call interface.

ECKD device
See extended count-key-data device.

ECL
See execution control list.

Eclipse
An open-source initiative that provides ISVs and other tool developers with a standard platform for developing plug-compatible application development tools.

eclipsed
Pertaining to a versioned object base (VOB) object that is not visible because another object with the same name is currently selected by the view.

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.

ECMAScript
A standard scripting language that was developed by the European Computer Manufacturers Association (ECMA) and is based on Netscape's JavaScript.

ECML
See Electronic Commerce Modeling Language.

e-commerce
(1) The sale and purchase of goods and services via the Internet; e-commerce is used to describe business-to-consumer (b2c) transactions. This definition is from the Localisation Industry Standards Association (LISA) Glossary.
(2) 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.

ECSA
See extended common system area.

EDF
See execution diagnostic facility.

edge
A return value or possible result from a state table action.

EDGE
See Enhanced Data GSM Environment.

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.

Edge Side Include (ESI)
A technology supporting cacheable and noncacheable Web page components that can be gathered and assembled at the edge of a network.

EDI
See electronic data interchange.

EDIFACT
Electronic Data Interchange for Administration, Commerce and Transport (a United Nations standard).

edit
(1) To change a numeric field for output by suppressing zeros and inserting commas, periods, currency symbols, the sign status, or other constant information.
(2) To add, change, delete, rearrange, or modify the form or format of data.

editable field
On a Notes form, a field whose value is determined by a formula that application designers write to supply a default value, edit the user's entry, and validate the entry to make sure it meets specific requirements.

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.

edition
A copy of a project. Editions may contain different versions of a the content within a project.

edition archive
A snapshot of an edition at a particular point in time. Edition archives can be restored on top of the current edition. They are a type of versioning for editions. Edition archives cannot be modified, they can only be restored.

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.

edit mask
A byte string that tells the edit machine instruction or the Edit (QECEDT) API how to format a numeric value into a readable character string. An edit mask can format a numeric value so that languages that cannot use machine instructions directly can take advantage of this function.

edit mode
The state in which users can create or modify a document.

editor
An application that enables a user to modify existing data.

editor access
An access level that allows users to create, read, and edit any documents. Servers can replicate new documents, change existing documents, and, if they have delete access, make deletions.

editor area
In Eclipse and Eclipse-based products, the area in the workbench window where files are opened for editing.

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.

EDL
See exchange data link.

EDM pool
See electronic data management pool.

EDP
See electronic design process.

EDU
See engine dispatchable unit.

EEQE
See extended error queue element.

EFD
See event forwarding discriminator.

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.

effective user
In Notes, the user under whose authority an agent runs. The effective user name will be used for database ACL access rights; rights to create databases, replicas, and templates on the server; and as the mail sender or document author. Effective user rights are not used to determine the operations an agent is permitted to perform; these are based on the agent signer (the agent owner).

EGL
See Enterprise Generation Language.

EGL build file
An XML file with an .eglbld extension, used to store definitions of EGL build parts.

EGL file
An Enterprise Generation Language program file (extension .eglpgm), definitions file (extension .egldef), or build file (extension .eglbld).

EGL keyword
A term that begins an EGL statement that is neither a function invocation nor an assignment statement. Keywords include add and delete.

EGL SDK
Enterprise Generation Language Software Development Kit: a file-based interface to EGL generation. The EGL SDK does not use the workbench, but extracts all required EGL files into a set of directories. You can use this file-based interface to produce EGL output from a software configuration management tool such as IBM Configuration Management and Version Control (CMVC) or Rational ClearCase.

EGL source file
A text file with an .egl extension, used to store definitions of EGL data, logic, and UI parts.

EGL statement
A directive that is coded into an EGL function part to cause an action when the generated program runs. Examples include an EGL assignment statement and an EGL add statement.

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.

EIM
See Enterprise Identity Mapping.

EIP
See execution interface program.

EIS
See enterprise information system.

EJB
See Enterprise JavaBeans.

EJB bean
See enterprise bean.

EJB container
A container that implements the EJB component contract of the J2EE architecture. This contract specifies a run-time environment for enterprise beans that includes security, concurrency, life cycle management, transaction, deployment, and other services. An EJB container is provided by an EJB or J2EE server. (Sun) See also EJB server.

EJB context
In enterprise beans, an object that allows an enterprise bean to invoke services provided by the container and to obtain information about the caller of a client-invoked method. (Sun)

EJB factory
An access bean that simplifies the creating or finding of an enterprise bean instance.

EJB home object
In EJB, an object that provides the life cycle operations (create, remove, find) for an enterprise bean. (Sun)

EJB inheritance
A form of inheritance in which an enterprise bean inherits properties, methods, and method-level control descriptor attributes from another enterprise bean that resides in the same group.

EJB JAR file
A Java archive that contains an EJB module. (Sun)

EJB module
A software unit that consists of one or more enterprise beans and an EJB deployment descriptor. (Sun)

EJB object
In enterprise beans, an object whose class implements the enterprise bean remote interface (Sun).

EJB project
A project that contains the resources needed for EJB applications, including enterprise beans, home classes, remote classes, JSP files, servlets, and deployment descriptors.

EJB query
In the EJB query language, a string that contains an optional SELECT clause specifying the EJB objects to return, a FROM clause that names the bean collections, an optional WHERE clause that contains search predicates over the collections, an optional ORDER BY clause that specifies the ordering of the result collection; and input parameters that correspond to the arguments of the finder method.

EJB query language
A query language that defines finder methods for entity beans with container managed persistence. The definition uses a language based on SQL that allows searches on the persistent attributes of an enterprise bean and associated bean attributes.

EJB reference
A logical name used by an application to locate the home interface of an enterprise bean in the target operational environment.

EJB server
Software that provides services to an EJB container. An EJB server may host one or more EJB containers. (Sun) See also EJB container.

elapsed queued time (queued time)
In Query Patroller, the length of time that elapses between the time a query is created and the time a query starts to run. See also elapsed total time.

elapsed total time
In Query Patroller, the combined total of the elapsed queued time and the elapsed run time for a query. See also elapsed queued time, execution time.

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 Commerce Modeling Language (ECML)
In e-commerce, a universal format for wallets that streamlines the collection of electronic data for shipping, billing, and payment on a merchant's Web site and thereby enhances the online shopping experience for consumers and merchants. IBM is one of many companies that are collaborating to develop ECML.

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 data interchange (EDI)
The exchange of structured electronic data between computer systems according to predefined message standards.

electronic data management pool (EDM pool)
In DB2 Universal Database for z/OS and OS/390, a pool of main storage that is used for database descriptors, application plans, authorization cache, application packages, and dynamic statement caching.

electronic design process (EDP)
A design process for electronics products that considers design, design technology, and design productivity for current and future technologies.

electronic document
A document that is stored on the computer, instead of printed on paper.

Electronic Industries Association (EIA)
A professional organization that recommends standards, such as RS-232-C and RS-422, for the electronics industry. The EIA also provides guidelines for communications interface wiring, signal levels, and connectors.

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.

electronic serial number (ESN)
Unique identification number embedded in a wireless phone by the manufacturer to prevent fraud. ESN differs from the mobile identification number, which is the wireless carrier's identifier for a phone in the network.

electronic signature
A stamp added to mail messages, fields, or sections that verifies that the person who originated the message is the author and that no one has tampered with the data.

electrostatic discharge (ESD)
The flow of current that results when objects having a static charge come into close enough proximity to discharge.

element
(1) A named piece of information, or a field, within a message, that has a business meaning agreed by the applications that create and process the message.
(2) In the Java development tools (JDT) feature of Eclipse, a generic term that can refer to Java packages, classes, types, interfaces, methods, or fields.
(3) An object that encompasses a set of versions, organized into a version tree.
(4) 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.
(5) In AFP Utilities, the smallest unit that is used to design an AFP resource.
(6) A constituent of a model.
(7) In markup languages such as SGML, XML, and HTML, a basic unit consisting of a start tag, end tag, associated attributes and their values, and any text that is contained between the two.

element address
In SNA, a value in the element field of the network address that identifies a specific resource within a subarea.

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.

element type
A class of versioned file or directory objects. ClearCase supports predefined element types. Users can define additional types that are refinements of the predefined types. When an element is created, it is assigned one of the currently defined element types in its versioned object base (VOB). Each user-defined element type is implemented as a separate VOB object.

ELF message
See external line format message.

ELLC
See enhanced logical link control.

ELPA
See extended link pack area.

e-mail
Documents and messages that are transmitted between users over a communication network.

e-mail activity
A method of delivering merchandising and marketing content to customers. E-mail activities deliver customized e-mail messages, based on JSP templates, which can include advertisements, suggestive selling initiatives, and promotions, among other merchandising and marketing content.

e-mail campaign
See e-mail promotion.

e-mail promotion
E-mail promotions are e-mail messages sent as part of a campaign. The e-mail is composed of a text, html, or JSP file that is used as the body of an e-mail message; a user or list of users to whom the e-mail will be sent; and a schedule for sending the e-mail. The list of recipients and the body of the e-mail can be personalized.

e-Marketing Spot
In WebSphere Commerce, data on a Web page that typically results from a marketing activity such as a campaign.

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. See also call level interface.

embedded system
A computer system that is a component of a larger machine or system. Embedded systems can respond to events in real time. Hosts of embedded systems include watches, household appliances, cars, and cellular phones.

EMC
See electromagnetic compatibility.

e-meeting
emergency restart
The CICS backout facility for an automatic restart following a system failure. It restores the recoverable resources updated by each interrupted transaction to the condition they were in when the transaction started.

emergency thread
A server thread that becomes available when either the work queue (the number of pending operations) or the time limit threshold since the last item was removed from the work queue is exceeded. This thread provides a method for the administrator to access the server during a denial of service attack.

EMI
See electromagnetic interference.

emitter
A program that takes the output from one system and converts the information into a different form.

EMP
See event monitoring point.

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.

empty activity
An activity with no defined implementation that can be used as a place holder in the design stage.

empty range
The part of a VSAM file that is available for insertion of new records.

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
(1) A program that allows a host system to communicate with a workstation in the same way as it would with the emulated terminal. The terminal emulation function allows client workstations to run CICS transactions that use 3270 data flows.
(2) A control program that permits functions written for one system or device to be run on another system or device.

EN
See end node.

enable
(1) To prepare a database, a text table, or a text column for use by the DB2 Net Search Extender or the DB2 XML Extender. See also disable.
(2) To turn on or activate.

Encapsulated Security Payload (ESP)
In a virtual private network (VPN), a security protocol that provides data confidentiality and integrity.

encapsulation
(1) In communication, a technique used by layered protocols by which a layer adds control information to the protocol data unit (PDU) from the layer it supports. In this respect, the layer encapsulates the data from the supported layer. In the Internet suite of protocols, for example, a packet would contain control information from the physical layer, followed by control information from the network layer, followed by the application protocol data.
(2) 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.

enclave
In Language Environment, an independent collection of routines, one of which is designated as the main routine. An enclave is roughly analogous to a program or run unit. An enclave is similar to a program or run unit.

encode
To convert data by the use of a code in such a manner that reconversion to the original form is possible.

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) A set of rules to represent character data.
(3) 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
(1) 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.
(2) The conversion of data into a cipher. A key is required to encrypt and decrypt the data. Encryption provides protection from persons or software that attempt to access the data without the key.

encryption algorithm
An algorithm that scrambles the data so that it becomes unreadable to someone who intercepts it.

encryption key
Security feature that ensures that only the intended recipient can read encrypted text. Every Notes user ID contains two: a public key for sending and encrypting and a private key for receiving and decrypting. Users may also have a public and private key for S/MIME encryption and signatures.

end bracket
In SNA, the value (binary 1) of the end bracket indicator in the request header (RH) of the first request of the last chain of a bracket; the value denotes the end of the bracket. See also conditional end bracket.

ending attribute character
For a display file, the character following the last position in a field.

end node (EN)
(1) 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.
(2) In APPN, a node that supports sessions between its local control point and the control point in an adjacent network node.
(3) A visual marker within a process that identifies where a particular flow ends. Other concurrent flows within the same process will still continue executing.

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-chain (EOC)
In SNA, an exception condition that occurs when the end-of-chain indicator is set in the request/response unit (RU) returned from VTAM.

end-of-day statistics
(1) In CICS Transaction Server, CICS statistics written to an SMF data set at the quiesce or termination of a CICS run, or at a user-specified time. See also interval statistics, unsolicited statistics.
(2) In CICS/VSE, CICS statistics written to the CSSL transient data destination at the quiesce or termination of a CICS run, or at a user-specified time. End-of-day statistics are reset by an end-of-day statistics collection.

end-of-file (EOF)
On a data medium, a coded character indicating the end of the medium.

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-file label
In a file, an internal label indicating the end of the file.

end of memory (EOM)
The outer boundary of an address space.

end-of-message (EOM)
In a DBCTL multisegment command, the ENTER key, which is the indicator that defines the end of the last or only segment. See also end-of-segment.

End of Procedure Division
In COBOL, the physical position of a COBOL source program after which no further procedures appear.

end-of-segment (EOS)
In a DBCTL multisegment command, the command recognition character followed by the ENTER key, which indicates the end of each segment preceding the last segment. See also end-of-message.

end-of-tape marker (EOT marker)
A reflective material placed on a magnetic tape to indicate the end of the recording area.

end of task (EOT)
End of task.

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 code (EOT code)
The character or sequence of characters that indicates termination of sending.

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) In a Tivoli environment, the ultimate recipient for Tivoli operations in a Tivoli region.
(2) A host or gateway that comprises part of a virtual private network (VPN) connection. A VPN includes two endpoints and a security policy.
(3) The system that is the origin or destination of a session.
(4) In Voice over Internet Protocol, a place where calls are originated and terminated.

endpoint list
In a Tivoli environment, a list of all endpoints in a Tivoli region with their assigned gateways.

endpoint listener
The point or address at which incoming messages for a Web service are received by a service integration bus.

endpoint method
In a Tivoli environment, a method that runs on an endpoint as the result of a request from another managed resource. Results of the method are forwarded to the gateway, and then to the calling managed resource.

endpoint system
Any system that is running OS/400 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 session handler
A user-provided part of a FEPI application that handles end of conversation and end of session processing.

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.

end-to-end latency
In replication, an approximate measurement of the time that replication requires to capture changes from a source database and apply those changes to a target database. See also Capture latency, Q Apply latency, Q Capture latency.

end-to-end probe platform (EPP)
A platform that gathers application performance data and simulates transactions, such that probes can be created to monitor the application appropriately.

end-user verification
For logical unit (LU) 6.2, checking the identification of users by means of identifiers and passwords on attach function-management headers (FMHs).

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.

engine
A speech recognition process which accepts voice data as input and returns the text form of what was said as output. It is the process which performs the recognition.

engine dispatchable unit (EDU)
Coordinates application requests to a DB2 database. Referred to as a process on UNIX operating systems and a thread on Windows operating systems.

engine type
Each engine must be configured with a specific type. The type is simply a textual tag associated with a specific engine and does not change the operation or functionality of the engine.

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 conflict detection
In SQL replication, conflict detection that guarantees data integrity among all replicas and the source table. The Apply program locks all replicas or user tables in the subscription set against further transactions. It begins detection after all changes made prior to locking have been captured.

Enhanced Data GSM Environment (EDGE)
A faster version of the GSM wireless service that is designed to deliver data at rates up to 384 Kbps and enable the delivery of multimedia and other broadband applications to mobile phone and computer users. The EDGE standard is built on the existing GSM standard, using the same time-division multiple access (TDMA) frame structure and existing cell arrangements.

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.
Enhanced Small Device Interface (ESDI)
A hard-disk interface developed in the mid-1980s.

enhancement request
A type of stakeholder request that specifies a new feature or functionality of the system. See also change request.

ENQ character
See enquiry character.

enqueue
(1) To place items in a queue. See also dequeue.
(2) To put a message on a queue. See also dequeue.

enqueued
The state of a task scheduled to update a physical segment of a database when another task is currently accessing that segment.

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.

enrollment
The process of entering and saving user or user group information in a portal.

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 application
See J2EE application.

enterprise application project (EAR project)
A structure and hierarchy of folders and files that contain a deployment descriptor and IBM extension document as well as files that are common to all J2EE modules that are defined in the deployment descriptor.

enterprise archive (EAR)
A specialized type of JAR file, defined by the J2EE standard, used to deploy J2EE applications to J2EE application servers. An EAR file contains EJB components, a deployment descriptor, and Web archive (WAR) files for individual Web applications. See also Web archive.

enterprise bean
A component that implements a business task or business entity and resides in an EJB container. Entity beans, session beans, and message-driven beans are all enterprise beans. (Sun)

enterprise configuration
A method of setting up servers so that the administrator can distribute the configuration of one of the servers to the other servers, using server-to-server communication.

enterprise database
A database that is designed to support a large, networked organization. An enterprise database offers scalability, security, and administrative features for large, complex projects.

Enterprise Generation Language (EGL)
A high-level language that allows developers to focus on business logic as they create complex business applications for deployment in any of several environments, including the Web. The language simplifies database and message-queue access, as well as the use of J2EE.

Enterprise Identity Mapping (EIM)
A mechanism for associating a person or entity to the appropriate user identities in various user registries throughout an enterprise. EIM provides application programming interfaces (APIs) for creating and managing these identity mapping relationships, as well as APIs that applications use to query this information.

Enterprise Information Portal
Software developed by IBM that provides tools for advanced searching, and content customization and summarization.

enterprise information system (EIS)
(1) In System Manager, all the resources that the applications manage and the functions for managing them.
(2) The applications that comprise the existing system of an enterprise for handling company-wide information. Examples of enterprise information systems include: an enterprise resource planning (ERP) system, a mainframe transaction processing system, and a legacy database system. (Sun) See also resource adapter.

Enterprise JavaBeans (EJB)
A component architecture defined by Sun Microsystems for the development and deployment of object-oriented, distributed, enterprise-level applications.

enterprise server
A robust, powerful server with extensive capabilities and resources that can provide the necessary reliability, availability, and scalability for network computing. Other computers can connect to the enterprise server and share the facilities that it provides. Examples of enterprise servers include the IBM S/390 family of servers.

enterprise service
A service that typically accesses one or more enterprise information systems (EIS).
Enterprise Systems Architecture ( ESA ESA/370)
The extension to the IBM System/370 architecture that includes the advanced addressability feature.

entitlement
(1) In security management, a service and list of attributes that identifies the target for a provisioning policy.
(2) A data structure that contains externalized security policy information. Entitlements contain policy data or capabilities that are formatted in a way that is understandable to a specific application.

entity
(1) A user, group, or resource that is defined to RACF.
(2) A person, object, or concept about which information is stored. In a relational database, entities are represented as tables. A database includes information about the entities in an organization or business, and their relationships to each other.
(3) In object-oriented design, an item that can be treated as a unit and, often, as a member of a particular category or type. An entity can be a concrete thing or an abstract idea.
(4) In markup languages such as XML, a collection of characters that can be referenced as a unit, for example to incorporate often repeated text or special characters within a document.
(5) A unit of data that can be classified and have stated relationships to other entities within that database.
(6) In OSI, the representation of a layer on a given open system.

entity bean
In EJB programming, an enterprise bean that represents persistent data maintained in a database. Each entity bean carries its own identity. (Sun) There are two types of entity beans: container-managed persistence (CMP) entity beans and bean-managed persistence (BMP) entity beans. See also session bean.

entropy
The minimum number of bits needed to represent the information that is contained in a message.

entry
(1) An item in an index. It consists of a main entry plus a locator, and can also have subentries or cross-references.
(2) 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.

entryOwner
An attribute that can be a user or a group, similar to what is allowed within the aclEntry. Each object has an associated entryOwner attribute. However, the entryOwner subject has certain privileges over the object. Entry owners are the administrators for particular objects. They have full access on that particular object, similar to the administrator DN. The administrator has full permission on any object in the database.

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.

entry-sequenced data set (ESDS)
A VSAM data set whose records are physically in the same order in which they were put in the data set. A VSAM data set is processed by addressed direct access or addressed sequential access and has no index. New records are added at the end of the data set.

entry thread
A thread which is used by the CICS DB2 attachment facility for transactions with special requirements, such as high priority transactions, or transactions with special accounting needs. See also command thread, pool thread.

entry-type attribute
A numeric, text, time, or date value that is typed in by a project user. An entry-type attribute can be configured with a default value, which users can accept or replace as they create or modify requirements. For example, to set a default cost of $20, format the entry-type attribute "Cost" to accept integer values and have a default value of 20. See also attribute type, attribute value, list-type attribute.

enumerated list
In DB2 Universal Database for z/OS and OS/390, a set of DB2 objects that are defined with a LISTDEF utility control statement in which pattern-matching characters (*, %, or ?) are used.

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
A structure within the message tree that is user-defined, and that can contain variable information that is associated with a message while it is being processed by a message flow.
Environmental Record Editing and Printing (EREP)
The program that makes the data contained in the system recorder file available for further analysis.

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 handle
A handle that identifies the global context for database access. All data that is pertinent to all objects in the environment is associated with this handle.

environment profile
A script that is provided with the DB2 Net Search Extender that contains settings for environment variables.

Environment Services System Services (ESSS)
A component of CICSPlex SM that implements the formal MVS/ ESA subsystem functions required by the product. ESSS provides cross-memory services, data space management, connection services, and lock management. An ESSS system address space is created at CICSPlex SM initialization and remains in the MVS image for the life of the IPL.

environment variable
(1) A variable that specifies how an operating system or another program runs, or the devices that the operating system recognizes.
(2) 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.

EOC
See end-of-chain.

EOF
See end-of-file.

EOM
(1) See end of memory.
(2) See end-of-message.

EOS
See end-of-segment.

EOT
See end of task.

EOT character
See end-of-transmission character.

EOT code
See end-of-transmission code.

EOT marker
See end-of-tape marker.

EP
(1) See Error Protocol.
(2) See entry point.

EPI
See external presentation interface.

EPOC
An operating system designed for mobile devices.

epoch time stamp
In the DCE Cell Directory Service (CDS), a timestamp that identifies directory replicas as being part of the same set. CDS uses the epoch timestamp when it performs a skulk operation on a directory.

EPP
See end-to-end probe platform.

EPVT
See error processor vector table.

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.

equijoin
A join operation in which the join-condition has the form expression = expression.

equivalent
In an XRF environment, the mutual attribute of any two DBCTL subsystems that are members of the same RSE. See also recoverable service element, recoverable service table.

ER
See exception response.

erase-on-scratch
The physical overwriting of data on a DASD data set when the data set is deleted (scratched).

ERDSA
See extended read-only dynamic storage area.

EREP
See Environmental Record Editing and Printing.

error
A discrepancy between a computed, observed, or measured value or condition and the true, specified, or theoretically correct value or condition.

error correction code (ECC)
A means of checking data accuracy by using redundant data and a common algorithm.

error log
A record of machine checks, device errors, and media statistics.

error log stream
A continuous flow of error information that is transmitted using a predefined format.

error message
Any message displayed by DirectTalk in the System Monitor as an alarm and optionally written to the DirectTalk error log, or to the AIX error log (as an alert). Strictly speaking, the term error message should include only red (immediate attention) and yellow (problem situation) messages but it is also used to refer to green (a red or yellow message has been cleared) and white (informational) messages.

error page range
A range of pages that are considered to be physically damaged. DB2 Universal Database for z/OS and OS/390 does not allow users to access any pages that fall within this range.

error processor vector table (EPVT)
A table containing addresses of the error group processors invoked by the routing mechanism of the node error program.

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.

error status block (ESB)
A recording area in a node error block (NEB) of the node error table.

error status element (ESE)
In the terminal error block of the terminal error table, a field that records occurrences of a particular type of error associated with a terminal.

ESA
See Enterprise Systems Architecture.

ESA/370
See Enterprise Systems Architecture.

ESA mode
An operation mode of the supervisor (generated with MODE=ESA) of a VSE system. Such a supervisor will run on a 370-XA or Enterprise Systems Architecture processor and provides support for multiple virtual address spaces, the channel subsystem, and more than 16MB of real storage.

ESB
See error status block.

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.

ESDI
See Enhanced Small Device Interface.

ESDS
See entry-sequenced data set.

ESDSA
See extended shared dynamic storage area.

ESE
See error status element.

ESI
(1) See Edge Side Include.
(2) See external security interface.

ESI processor
A feature in the WebSphere Web server plug-in that supports fragment caching and fragment assembly into full pages.

ESM
See external security manager.

ESMT
See external subsystem module table.

ESN
See electronic serial number.

ESP
See Encapsulated Security Payload.

ESQA
See extended system queue area.

ESQL
See extended SQL.

ESQL data type
A characteristic of an item of data that determines how that data is processed. ESQL supports six data types (boolean, datetime, null, numeric, reference, and string). Data that is retrieved from a database or is defined in a message model is mapped to one of these basic ESQL types when it is processed in ESQL expressions.

ESQL field reference
A sequence of period-separated values that identify a specific field (which might be a structure) within a message tree or a database table. The path from the root of the information to the specific field is traced using the parent/child relationships. An example of a field reference might be something like Body.Invoice.InvoiceNo.

ESQL function
A single ESQL expression that calculates a value from a number of given input values. The function can take input parameters but has no output parameters; it returns the value that results from the implementation of the expression to the caller. The ESQL expression can be a compound expression such as BEGIN END.

ESQL module
A sequence of declarations that define MODULE-scope variables and their initialization, and a sequence of subroutine (function and procedure) declarations that define a specific behavior for a message flow node. A module must begin with the CREATE node_type MODULE statement and end with an END MODULE statement. The node_type must be one of COMPUTE, DATABASE, or FILTER. The entry point of the ESQL code is the MODULE scope procedure named MAIN.

ESQL procedure
A subroutine that has no return value. It can accept input parameters from and return output parameters to the caller.

ESQL variable
A local temporary field that is used in processing a message.

ESS
See IBM TotalStorage Enterprise Storage Server.

ESSS
See Environment Services System Services.

ESTAE
See extended specify task abnormal exit.

ETB character
See end-of-transmission-block character.

E-TDMA
See extended time division multiple access.

Ethernet
A standard protocol for a 10-Mbps baseband local area network (LAN) that allows multiple access and handles contention by using Carrier Sense Multiple Access with Collision Detection (CSMA/CD) as the access method.

ETL
See extract, transform, and load.

ETR
See external throughput rate.

ETS
See European Telecommunications Standard.

ETSI
See European Telecommunications Standards Institute.

ETX character
See end-of-text character.

EUC
(1) See Extended UNIX Code.
(2) See extended UNIX coded character set.

EUC encoding scheme
See Extended UNIX Code encoding scheme.

EUDSA
See extended user dynamic storage area.

Euro-ISDN
The common European ISDN standard, agreed in 1993, providing a basic range of services and supplementary services using 30 B-channels plus a D-channel over an E1 trunk.

European Telecommunications Standard (ETS)
A standard produced by the European Telecommunications Standards Institute.

European Telecommunications Standards Institute (ETSI)
A European organization founded in 1988 and responsible for the establishment of technical telecommunications standards. It produces European Telecoms Standards (ETS) for its membership, which consists of network operators, PTT manufacturers, users, and research institutes. Some of these functions used to be performed by the Commission of European Post and Telegraph. ETSI is similar in function to the International Telecommunication Union.

evaluation rule
In a privacy management environment, an expression that (a) represents an individual's choice to opt in or opt out of a specified group or purpose or (b) represents another condition, such as a legal restriction on the use of PII. See also condition rule.

even positive acknowledgment (ACK0)
In BSC, the even-numbered, positive acknowledgment character, which indicates that text was received without transmission errors.

event
(1) A change to an application entity that triggers a business object. This business object, which contains data and a verb, becomes an event in the WebSphere business integration system. See also application event.
(2) An occurrence of significance to a task or system, such as the completion or failure of an operation.
(3) An action, series of actions, or occurrence to which an application responds. The action can be user-generated, system-generated, or application-generated.
(4) A means by which CICS business transaction services inform an activity that an action is required or an action has completed. An activity can define events (by naming them) about which it wants to be informed.
(5) 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.
(6) In the Notes Calendar, an entry with a duration of at least one day. For example, an all-day meeting or a vacation is an event.
(7) The encapsulated data that is sent as a result of an occurrence, or situation, in the system.
(8) Any significant change in the state of a system resource, network resource, or network application. An event can be generated for a problem, for the resolution of a problem, or for the successful completion of a task. See also resource model, receiver, indication.
(9) 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.

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 adapter
Software that converts events into a format that the Tivoli Enterprise Console product can use and forwards the events to the event server.

event analyzer
A database object that provides information about the database events that have taken place. An event analyzer is used with the event monitor file to assess and record performance information.

event class
A classification for an event that indicates the type of information that the event adapter can send to the event server.

event control block ( ECB ECB)
A control block used to represent the status of an event.

event correlation
The process of analyzing event data to identify patterns, common causes, and root causes. Event correlation analyzes the incoming events for predefined states, using predefined rules, and against predefined relationships. See also risk correlation.

event data
In an event message, the part of the message data that contains information about the event (such as the queue manager name, and the application that gave rise to the event). See also event header.

event delivery
The action of delivering an event (by a connector) to InterChange Server.

event detection
The process by which the WebSphere business integration system identifies that an application event has been generated. Event detection is part of the overall process of event notification. See also application event, event detection mechanism, event notification, event notification mechanism, event trigger.

event detection mechanism
The mechanism or processes that identify that an application event was generated. For example, some application connectors use database triggers to detect events. See also event detection, event notification.

event-driven payments
In WebSphere Commerce, a software layer (API) that provides payment-processing logic at a business level. As a subcomponent of the order system, event-driven payments determines what type of payment actions should be executed at specific times or business events in the life cycle of an order or a return.

event escalation
The notification that a violation or trend toward violation of a service level agreement has been detected as a result of evaluating and analyzing metric data. Events are created in various ways, using, for example, SNMP traps, Tivoli Enterprise Console events, or e-mail notification.

event filter
(1) In OSI, a method for excluding certain types of events so that they are not reported.
(2) In a Tivoli environment, rules that determine which events are sent from an event adapter or displayed on an event console. Also used to determine which events a specific correlation rule will apply to.
(3) The criteria that must be met by an event before a rule action is executed.
(4) A logical expression of criteria that determines which events are forwarded to the application program that registers the event filter with the event sieve agent.

event forwarding discriminator ( EFD EFD)
A managed object that describes the criteria used to select which event reports are sent and to whom they are sent.

event group
A set of events that meet certain criteria defined by event group filters, which include constraints that are expressions that define the filter conditions. Event console operators can monitor event groups that are relevant to their specific areas of responsibility.

event header
In an event message, the part of the message data that identifies the event type of the reason code for the event. See also event data.

event isolation
A feature of InterChange Server that ensures that when multiple collaborations process events containing the same business object instance, the events are processed sequentially in the order received. InterChange Server does not automatically perform event isolation. The collaboration developer must design templates to take advantage of this feature. See also collaboration-object group, port matching.

event listener
A type of asynchronous bean that serves as a notification mechanism and through which Java 2 Platform, Enterprise Edition (J2EE) components within a single application can notify each other about various asynchronous events.

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 management service
A service of InterChange Server that persistently stores events until collaborations are finished using them. This service ensures that InterChange Server and collaborations can recover from crashes without losing events.

event management table
One of three types of database tables in the InterChange Server repository, the event management tables store business objects that are currently being processed.

event message
A message that contains information (such as the category of event, the name of the application that caused the event, and queue manager statistics) relating to the origin of an instrumentation event in a network of WebSphere MQ systems.

event monitor
A database object for monitoring and collecting data on database activities over a period of time. For example, starting the database might be an event that causes an event monitor to track the number of users on the system by taking an hourly snapshot of authorization IDs using the database.

event monitoring point (EMP)
Point in the CICS code at which CICS monitoring data is collected. There are two types of EMP: system-defined EMP, which collects predetermined CICS monitoring information and which cannot be relocated, and user-defined EMP, which collects task monitoring information. See also monitoring control table.

event notification
The mechanism by which events are polled for and detected by a connector. See also event detection, event detection mechanism, event notification mechanism, event trigger.

event notification mechanism
The mechanism or processes that notify the connector that an application event was generated. The event notification mechanism includes all of the subprocesses of event polling. See also event detection, event notification.

event polling
The process by which a connector retrieves application events. Event polling consists of requesting and retrieving events from the event table and passing them to the connector for further processing. In most cases, the processed event or the status of the event is returned to the application. You can customize how the connector polls for event, including setting specific times and frequency. See also event request.

event pool
The set of events recognized by an activity (system events and user events that have been defined to it). Each activity has an event pool associated with it. An activity's event pool is initialized when the activity is created, and deleted when the activity is deleted. Event-related commands such as DEFINE INPUT EVENT and DEFINE COMPOSITE EVENT operate on the event pool associated with the current activity.

event publishing
A data publishing solution that captures transactional data from DB2 Universal Database recovery logs and publishes that data as XML messages. The XML messages are published to WebSphere MQ queues where one or more user applications can retrieve and use those messages.

event queue
The queue onto which the queue manager puts an event message after it detects an event. Each category of event (queue manager, performance, configuration, instrumentation, or channel event) has its own