ISO/IEC 9594-5:2005 provides specifications for how information about objects, e.g. persons, is organized, created, maintained and retrieved. It also gives provisions for protecting stored information through authentication and access control specifications.
ISO/IEC 9594-5:2005 specifies the Directory Access Protocol, the Directory System Protocol, the Directory Information Shadowing Protocol and the Directory Operational Binding Management Protocol, fulfilling the abstract services specified in ISO/IEC 9594-2, ISO/IEC 9594-3, ISO/IEC 9594-4 and ISO/IEC 9594-9. It defines both the use of an OSI and of an TCP/IP underlying protocol stack.