ISO/IEC 9594-1:2017 pdf download -Information technology – Open Systems Interconnection –The Directory: Overview of concepts, models and services.
3.3 Distributed Operation definitions The following terms are defined in Rec. ITU-T X.518 | ISO/IEC 9594-4: a) uni-chaining; b) multi-chaining; c) referral. 3.4 Replication definitions The following terms are defined in Rec. ITU-T X.525 | ISO/IEC 9594-9: a) caching; b) cache copy; c) entry copy; d) master DSA; e) replication; f) shadow consumer; g) shadow supplier; h) shadowed information; i) shadowing agreement. 3.5 Basic directory definitions The following terms are defined in this Recommendation | International Standard: 3.5.1 the Directory: A collection of open systems cooperating to provide directory services. 3.5.2 directory information base (DIB): The set of information managed by the Directory. 3.5.3 (directory) user: The end user of the Directory, i.e., the entity or person which accesses the Directory.
The term “Directory Specification” (as in “this Directory Specification”) shall be taken to mean Rec. ITU-T X.500 | ISO/IEC 9594-1. The term “Directory Specifications” shall be taken to mean the ITU-T X.500-series Recommendations, except for Rec. ITU-T X.509, and all parts of ISO/IEC 9594, except for ISO/IEC 9594-8. This Directory Specification uses the term first edition systems to refer to systems conforming to the first edition of these Directory Specifications, i.e., the 1988 edition of the series of CCITT X.500 Recommendations and the ISO/IEC 9594:1990 edition. This Directory Specification uses the term second edition systems to refer to systems conforming to the second edition of these Directory Specifications, i.e., the 1993 edition of the series of ITU-T X.500 Recommendations and the ISO/IEC 9594:1995 edition. This Directory Specification uses the term third edition systems to refer to systems conforming to the third edition of these Directory Specifications, i.e., the 1997 edition of the series of ITU-T X.500 Recommendations and the ISO/IEC 9594:1998 edition. This Directory Specification uses the term fourth edition systems to refer to systems conforming to the fourth edition of the Directory Specifications, i.e., the 2001 editions of Recs ITU-T X.500, ITU-T X.501, ITU-T X.511, ITU-T X.518, ITU-T X.519, ITU-T X.520, ITU-T X.521, ITU-T X.525, and ITU-T X.530, the 2000 edition of Rec. ITU-T X.509, and parts 1-10 of the ISO/IEC 9594:2001 edition. This Directory Specification uses the term fifth edition systems to refer to systems conforming to the fifth edition of these Directory Specifications, i.e., the 2005 edition of the series of ITU-T X.500 Recommendations and the ISO/IEC 9594:2005 edition. This Directory Specification uses the term sixth edition systems to refer to systems conforming to the sixth edition of these Directory Specifications, i.e., the 2008 edition of the series of ITU-T X.500 Recommendations and the ISO/IEC 9594:2008 edition.
6 Overview of the Directory The Directory is a collection of open systems which cooperate to hold a logical database of information about a set of objects in the real world. The users of the Directory, including people and computer programs, can read or modify the information, or parts of it, subject to having permission to do so. Each user is represented in accessing the Directory by a Directory User Agent (DUA) or an LDAP client, each of which is considered to be an application-process. These concepts are illustrated in Figure 1. NOTE – The Directory Specifications refer to the Directory in the singular, and reflects the intention to create, through a single, unified, name space, one logical directory composed of many systems and serving many applications. Whether or not these systems choose to interwork will depend on the needs of the applications they support. Applications dealing with non-intersecting worlds of objects may have no such need. The single name space facilitates later interworking should the needs change. For a variety of reasons, such as security, connectivity, or business decisions, it is likely that some portions of the Directory may be unreachable from other portions of the Directory using third edition operations. This results in differing views of the Directory. Such differing views may contain related entries about a given real world object. Such related entries may or may not have the same distinguished name. Using fourth or subsequent edition systems, it is possible to perform operations across multiple, differing views to provide an integrated response to the user. Specifically: – DMD administrators (see 9.2) may have a need to publish their own view (or views) of some specific real-world object; a real-world object may thus be modelled by multiple independent entries in the directory. This may happen whether or not they need to interwork. Interworking using DSP may also be unsupported.