OSI/MHS Gateway Programmatic Interface (GPI) Reference Manual
Glossary
OSI/MHS Gateway Programmatic Interface (GPI) Reference Manual—522223-001
Glossary-6
definition
definition. A declaration provided by Compaq for use in applications that use a specific 
procedural interface, such as the APS or SPI procedures.  Definitions are commonly 
provided in definition files.
definition files. A set of files containing declarations for use in applications that use a 
specific procedural interface.
In the case of the Subsystem Programmatic Interface (SPI), there is a standard definition 
file in Data Definition Language (DDL) and a definition file for each of the 
programming languages supporting SPI; the latter files are derived from the DDL 
definition file.  Likewise, each subsystem that has a token-oriented programmatic 
interface has one definition file for DDL and one for each programming language. 
Some subsystems—for instance, data communications subsystems—have additional, 
shared definition files. See also SPI standard definitions, data communications standard 
definitions, or EMS standard definitions. 
delivery envelope. An “inner” X.400 envelope that relates to the P3 protocol. A delivery 
envelope may be included in the message body part for an IPM or the primary body part 
for an EDI interchange.  A delivery envelope is not the same as and should not be 
confused with an “outer” X.400 envelope, which is attached to messages, probes, and 
reports and relates to the P1 protocol.
delivery report. A notification to the originator of a message that indicates the message was 
successfully delivered to each of the intended recipients. See also nondelivery report.
diagnostic code. A value indicating why a message was not delivered (called a non-delivery-
diagnostic code in the X.411 standard).
Distributed Systems Management. See DSM.
distribution list. A list of users to whom it is possible to address messages collectively. The 
distribution list name logically represents the names of all members of the list. 
OSI/MHS and Transfer both support distribution lists.
distributor. An EMS process that distributes event messages from event logs to requesting 
management applications, to Guardian 90 console message destinations, or to a collector 
on another node. See also compatibility distributor, printing distributor, or collector. 
DLIST object. An object type, used in OSI/MHS management interfaces, that identifies a 
local distribution list within the Compaq OSI/MHS subsystem.
DLISTMEMBER object. An object type, used in OSI/MHS management interfaces, that 
identifies an individual member of a local distribution list.
domain. A collection of nodes on an X.400 network; these are connected through MTAs. 
There are two types of domains: ADMDs and PRMDs.
DSM (Distributed Systems Management). A set of tools used to manage Compaq 
NonStop™ systems and Expand networks. These tools include the ViewPoint console 
application and various other applications, the Subsystem Control Facility (SCF) for 










