LDAP RFC
LDAPv3

RFC2251
 Lightweight Directory Access Protocol (v3)
RFC2252
 LDAPv3: Attribute Syntax Definitions
RFC2253
 LDAPv3: UTF-8 String Representation of Distinguished Names
RFC2254
 The String Representation of LDAP Search Filters
RFC2255
 The LDAP URL Format
RFC2256
 A Summary of the X.500(96) User Schema for use with LDAPv3