http://www.rfc-editor.org/rfc/rfc2251.txt
RFC 2251: Lightweight Directory Access Protocol (v3), M. Wahl, T. Howes, S. Kille1997-12-01T23:00:00-00:00The protocol described in this document is designed to provide access to directories supporting the X.500 models, while not incurring the resource requirements of the X.500 Directory Access Protocol (DAP). [STANDARDS-TRACK]