Glossary of Terms : E

e-Business

The transaction of business over an electronic medium such as the Internet.

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.

Top

Enterprise JavaBeans (EJB)

Enterprise JavaBeans is a cross-platform component architecture for the development and deployment of multi-tier, distributed, scalable, object-oriented Java applications. Enterprise JavaBeans makes it easy to write business applications as components by providing a set of automatic services to support scalable transactional application server components. Enterprise JavaBeans can be deployed on top of existing transaction processing systems including traditional transaction processing monitors, web servers, database servers, application servers, etc.

A standard JavaBean is, by definition, a client-side component that cannot, by default, be accessed and manipulated by other clients at runtime. Enterprise JavaBeans, in contrast, have no user interface component and reside entirely on an EJB-aware server such as CICS Transaction Server.

Top

Enterprise JavaBeans (EJB) Server

A more correct term would probably be EJB-aware server. A server which provides the environment for the deployment and processing of Enterprise JavaBeans. CICS Transaction Server is an example of an EJB-aware server.

Top

Execution Diagnostic Facility (EDF)

A CICS facility used for testing application programs interactively, without the requirement to change the source program or the program preperation procedure. The facility intercepts execution of the program at various points (e.g. EXEC CICS commands) and displays information about the program at these points.

Top

Extended Binary Coded Decimal Interchange Code (EBCDIC)

The standard interchange code used by IBM mainframe operating systems e.g. EBCDIC representation of a blank space " " is X'40'. The EBCDIC character set contains 256 8-bit characters.

Top

eXtensible Markup Language (XML)

Is a W3C recommendation and provides a standard approach for:

Describing information
Capturing information
Processing information
Publishing information

XML allows you to describe the abstract structure of your data using your own vocabulary, i.e. it provides a standardised framework for you to define your own TAGS where HTML has a fixed set of TAGS.

Top

External Call Interface (ECI)

A CICS facility that allows a calling program to call a CICS program as though it had been linked to (using the EXEC CICS LINK command) by another CICS program.

Top

External CICS Interface (EXCI)

Part of the CICS Inter-Region Communication (IRC) facility, which enables communication between a non-CICS MVS address space and CICS using a Distributed Program Link (DPL). There are two interfaces available; the simple command interface and the more complex, but more versatile, call interface.

Top

External Security Manager (ESM)

In the early days of computing authorisation was generally controlled by the applications and software products themselves i.e. internally. Also access to datasets and files was controlled by a password for each dataset or file.

An External Security Manager is a software product, which controls authorisation, security for applications and software products externally. The applications and software products no longer need to perform authentication themselves they can query the External Security Manager to establish whether the user (or program) should be granted access to a particular resource. IBM's RACF is an External Security Manager.

Top