http://www.rfc-editor.org/rfc/rfc3674.txt
RFC 3674: Feature Discovery in Lightweight Directory Access Protocol (LDAP), K. Zeilenga2003-12-01T23:00:00-00:00The Lightweight Directory Access Protocol (LDAP) is an extensible protocol with numerous elective features. This document introduces a general mechanism for discovery of elective features and extensions which cannot be discovered using existing mechanisms.