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X.500 Last modified: Tuesday, October 14, 2003
An ISO and ITU standard that defines how global directories should be structured. X.500 directories are hierarchical with different levels for each category of information, such as country, state, and city. X.500 supports X.400 systems.
An introduction to directories and X.500 Contains an overview of directories with specific emphasis on the X.500 directory architecture. Also provides information on the LDAP standard and links to related information about directories, the X.500 standard, and directory services. An LDAP Roadmap and FAQ Presents an annotated tutorial roadmap of LDAP documents and resources, including information about the IETF's directory service efforts, links to implementations, and links to existing LDAP/X.500-based directories.	Related Categories Networking Standards Related Terms Active Directory CCITT directory service ISO ITU NDS X.400