General

This part of ISO/IEC ISP 15125 profiles the behaviour of a DSA regarding the operation of the Directory System Protocol (DSP) when communicating with another DSA, as an invoker, as a performer, or both. It also profiles the coordination of a DSA communication across several associations to perform a particular distributed operation. It also covers the behaviour of DSAs when acting in accordance with the rules of Distributed Operations (although, in this case, the interaction can be by means of returning referrals or continuation references to DUAs using the DAP protocol).

The objective of this part of ISO/IEC ISP 15125 is to define capabilities and constraints on support for DSP by DSAs so that DSAs will be able to interwork within the Directory.

It therefore profiles the following:

• DSAs as DSP invokers in terms of both protocol and functionality
• DSAs as DSP performers in terms of both protocol and functionality
• DSAs as users over (DAP or DSP) of Referrals and Continuation references
• DSAs as users of HOBS (Hierarchical Operational Bindings) and of Shadow Operational Bindings in so far as they affect distributed operations using DSP

Conformance to DOP (Directory Operational Protocol) is outside the scope of this part of ISO/IEC ISP 15125.

The objective of this part of ISO/IEC ISP 15125 is to ensure that DSAs will be able to interwork within the Directory in two respects:

• Correct protocol behaviour
• Correct behaviour in respect of the role that each DSA has to play in respect of Distributed Operations Factors outside the scope of this part of ISO/IEC ISP 15125 include, but are not limited to:
• DIT structure
• The techniques of authentication more rigorous than simple authentication with passwords DSAs that do not support the distributed Directory are outside the scope of this part of ISO/IEC ISP 15125.

Position Within the Taxonomy

This part of ISO/IEC ISP 15125 is identified in ISO/IEC TR 10000-2 as “ADY22-DSA support of Distributed Operations”.

It may be combined with other parts of ISO/IEC ISP 15125, or with ISO/IEC ISP 15126-1 specifying the normal use of the directory, and with T-Profiles specifying the OSI connection-mode transport service.¹

Scenario

The model used is described in Overview of Concepts, Models, and Services in [ISO/IEC 9594-1 : 1995 | ITU-T Rec. X.500 (1993)]. The specifications of this part of ISO/IEC ISP 15125 apply to both the invoker and the performer roles of DSP, and also to the use of referrals and continuation references over DAP. All protocol aspects of DAP, however, are profiled by ISO/IEC ISP 15125-3.

A DSA handles incoming DAP and DSP protocols, and creates chained and multi-chained operations in accordance with defined procedures.

¹ T-Profiles are relevant to protocol-information and its handling (see 8.14)