X

XCF
See cross-systems coupling facility (XCF).
X extent
A separate extent, part of the system log. During backout in emergency restart, system log records are written to the X extent. The presence of an X extent is mandatory if CICS Transaction Server is using a local DL/I system; otherwise, it is optional. The X extent can be used for audit purposes.
XLT
See transaction list table (XLT)
XM
See transaction manager (XM).
XML
See extensible markup language (XML)
XML Metadata Interchange
A standard for exchanging metadata information using XML technology. See also extensible markup language (XML)
Xname resource classes
The general resource classes that CICS uses based on X name system initialization parameters. For example, if XTRAN=YES is specified, TCICSTRN and GCICSTRN are used.
XPI
See user exit programming interface (XPI).
XPLink
An OS/390 and z/OS compiler option for C and C++ programs. The term XPLink is derived from Extra Performance Linkage, it is also called the "high performance linkage option" in some places.
XRF
See Extended Recovery Facility (XRF)
XRF-capable terminal
In CICS Transaction Server, a remote SNA VTAM terminal connected through a boundary network node IBM 3745/3725/3720 Communication Controller with an NCP that supports XRF. In an XRF configuration, this is a class 1 terminal and has a backup session to the alternate CICS system.
XRST
See extended restart (XRST).
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