TS/MP 2.5 Pathsend and Server Programming Manual

definition files A set of files containing data declarations for items related to SPI messages and their processing.
The core definitions required to use SPI are provided in a DDL file and in several language-specific
definition files, one for each programming language that supports SPI. The HP DDL compiler
generates the language-specific files from the DDL file. Subsystems that support SPI provide
additional definition files containing subsystem-specific definitions.
delimiters Characters that make it possible for a SCREEN COBOL requestor and an external device or
front-end process to exchange compact variable-length messages efficiently; delimiters can be
message delimiters or field delimiters.
descriptor For each elementary data item, the SCREEN COBOL compiler builds a data structure that describes
the size, type, usage, and dependencies of the item. All the information that pertains to a given
item makes up the descriptor for that item. For example, the PICTURE specification is included in
the descriptor. The descriptors are passed to the TCP in the pseudocode and provide a dictionary
of information for interpreting and handling incoming data. When the MAP or SMAP compiler
option is used, the descriptors appear in the compiler map at the end of the listing.
diagnostic screen A screen of information that is displayed to inform the terminal operator of error conditions and
termination status.
dialog A multiple-message communication between a requestor and a context-sensitive server. A dialog
is also called a conversation. See also context sensitivity and contextsensitive server.
disk process In the NonStop Kernel operating environment, the portion of the operatingsystem software that
performs read, write, and lock operations on disk volumes and creates TMF audit records. See
also file system.
display attribute A terminal display feature that is given a screen data name. The screen data name can be
associated with a predefined system name in the SPECIAL-NAMES paragraph and therefore be
manipulated by a SCREEN COBOL program.
distributed data Information (for example, customer names and addresses, inventory items, and personnel records)
that resides on more than one node in a network and can be accessed by authorized users from
any node in that network.
distributed
processing
A type of processing environment in which resources are distributed among CPUs within a single
system or spread across a network of systems. A user on any network node can, if properly
authorized, access resources and database files anywhere within the network.
Distributed
Systems
Management
(DSM)
A group of tools for managing a variety of subsystems in a distributed processing environment.
distributed
transaction
processing (DTP)
The coordination of transactions among application servers residing within an Expand network
and possibly accessing different database management systems (NonStop SQL/MP and Enscribe).
DTP allows the coordination of multiple, autonomous actions as a single logical unit of work.
double-byte
character
A character represented in two bytes. See also double-byte character set.
double-byte
character set
(DBCS)
A character set, such as Kanji, that uses two bytes of data to represent a single character.
DSM See Distributed Systems Management (DSM)
dumb terminal See fixed-function terminal.
dynamic server A server process that the PATHMON process creates after a TCP or ACS Subsystem process has
waited for a specified time period for a static server to become available. A dynamic server
process exists only as long as it is needed. See also static server.
EDIT file A source text file that can be augmented and modified by the user through an HP text editor
program such as TEDIT (PS Text Edit).
EMS See Event Management Service (EMS).
EMS log file See event log file.
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