In XML, the term used to describe a
document that conforms to the rules of the associated schema. See also
schema.
validation
A process that checks persistent
collection structures to ensure that they are built correctly.
variable cross-reference support (VCRS)
The
offline program that scans a partitioned data set and prints a cross-reference
listing of the global variable symbols used in the data set, lists the PDS
members in which the symbols are used, and lists any other global variables
that depend on those members.
VCRS
Variable cross-reference
support.
VCT
Virtual file access (VFA) count.
VEQR
Virtual-equals-real.
VEQV
Virtual-equals-virtual.
verb
A conversation statement that
transaction programs issue to communicate through the LU 6.2 protocol
boundary. The program's current conversation state determines what
verbs a transaction program can issue.
vertical allocation
When allocating record
space on DASD, logically adjacent records are allocated sequentially to the
same physical device. Contrast with horizontal
allocation.
VFA
Virtual file access.
VFA candidate
A record held in virtual file
access (VFA) that may or may not be synchronized across processors. A
record that is synchronized across processors is called a VFA
synchronization candidate.
VIPA
Virtual Internet Protocol (IP)
address.
virtual address
The address of a location in
virtual storage. A virtual address must be translated into a real
address to process the data in processor storage. See also
absolute address, logical address, physical
address, and real address.
virtual-equals-real (VEQR) mode
An operating
mode in which system virtual memory (SVM) addresses are equal to ECB virtual
memory (EVM) addresses. Virtual-equals-real (VEQR) mode is used to test
and debug code that is being migrated to the TPF 4.1 system.
virtual file access (VFA)
A storage
management facility that dynamically allocates frequently referenced records
to main storage.
virtual file access count (VCT) list
A
secondary CPU loop list which contains entries that were forced to give up
control after exceeding a system resource threshold, one of which is the
number of virtual file access (VFA) record accesses.
virtual IP address (VIPA)
An Internet
Protocol (IP) address that is associated with a Transmission Control
Protocol/Internet Protocol (TCP/IP) stack without associating with a specific
physical network attachment, thereby allowing error recovery if failures
occur.
virtual reader
The VM/ESA facility that
supplies input to a virtual machine.
Virtual Telecommunications Access Method (VTAM)
An
IBM licensed program that controls communication and the flow of data in a
computer network. It provides single-domain, multiple-domain, and
multiple-network capabilities.