http://www.rfc-editor.org/rfc/rfc3771.txt
RFC 3771: The Lightweight Directory Access Protocol (LDAP) Intermediate Response Message, R. Harrison, K. Zeilenga2004-04-01T23:00:00-00:00This document defines and describes the IntermediateResponse message, a general mechanism for defining single-request/multiple-response operations in Lightweight Directory Access Protocol (LDAP). The IntermediateResponse message is defined in such a way that the protocol behavior of existing LDAP operations is maintained. This message is intended to be used in conjunction with the LDAP ExtendedRequest and ExtendedResponse to define new single-request/multiple-response operations or in conjunction with a control when extending existing LDAP operations in a way that requires them to return intermediate response information. [STANDARDS-TRACK]