This Recommendation1 describes a lightweight directory access protocol (LDAP) schema to represent ITU-T H.323 endpoints. It is an auxiliary class related to [ITU-T H.350] and derives much of its functionality from that architecture. Implementers should review [ITU-T H.350] in detail before proceeding with this Recommendation. Its attributes include all ITU-T H.323 alias types. These aliases can be downloaded to an endpoint for automatic configuration@ accessed by a gatekeeper for call signalling and authorization@ and published to white pages to create user dialling directories. The scope of this Recommendation does not include normative methods for the use of the LDAP directory itself or the data it contains. The purpose of the schema is not to represent all possible data elements in the ITU-T H.323 protocol@ but rather to represent the minimal set required to accomplish the design goals enumerated in [ITU-T H.350]. Extending the schema The h323Identity classes may be extended as necessary for specific implementations. See the base ITU-T H.350 Recommendation for a discussion on schema extension. 1 This Recommendation includes an electronic attachment containing a text file with the schema configuration file for h323Identify.