OSI/MHS Gateway Programmatic Interface (GPI) Reference Manual
About This Manual
OSI/MHS Gateway Programmatic Interface (GPI) Reference Manual—522223-001
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What Related Publications Are Available?
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Appendix E, Event Messages, lists the event messages generated by the GPI. 
What Related Publications Are Available?
The most closely related manual, the OSI/MHS Gateway Programmatic Interface (GPI) 
Programming Guide, provides important background information about X.400 gateways 
and Compaq OSI/MHS.  It presents a detailed overview of how the GPI operates and 
how to write client application programs using the GPI procedures. Other related 
publications fall into three categories: documents prepared by standards groups, 
Compaq programming manuals, and other Compaq OSI/MHS manuals.
Documents Prepared by Standards Groups
To obtain the most current and definitive information about the X.400 API, refer to the 
X.400 Application Program Interface Association (XAPIA) and X/Open Company 
Limited specifications and the International Telegraph and Telephone Consultative 
Committee (CCITT) recommendations listed below:
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CCITT Blue Book (Volume VIII - Fascicle VIII.7, Data Communications Networks, 
Message Handling Systems), Recommendations X.400-X.420 provide the most 
detailed descriptions of elements of the MHS service, message transfer protocol, and 
interpersonal messaging protocol (for the X.400 1988 standard).  In this manual, the 
title of this document is abbreviated to Recommendations X.400-X.420 (1988).
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CCITT Recommendation X.435 (Message Handling Systems: Electronic Data 
Interchange) provides descriptions of elements of the MHS service that relate to 
electronic data interchange messaging (EDIMG).
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X.400 API Association and X/Open Company Limited, X.400 API Specification, 
Version 2.0, © 1989-1990, provides descriptions of object classes and attribute 
types (for the X.400 1984 and 1988 standards).  In this manual, the title of this 
document is referred to as the XAPIA-1988 specification.
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X.400 API Association and X/Open Company Limited, OSI Object Management 
API Specification describes the object management API functions.
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X.400 API Association and X/Open Company Limited, EDI Messaging Package 
Specification, © 1991, describes the electronic data interchange API functions.
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X.400 API Association, X.400 Gateway API Specification, Version 4.0 (20 June, 
1989) provides descriptions of the Gateway API functions, object classes, and 
attribute types (for the X.400 1984 standard). In this manual, the title of this 
document is referred to as the XAPIA-1984 specification.
In addition to the preceding documents, references to other CCITT recommendations 
appear in this manual and are identified by their number only: for example, 
Recommendation T.501 or Recommendation T.61[3].
Programming Manuals
For information about calling procedures from TAL and C programs, see the following 
Compaq manuals:










