openldap/doc/drafts/draft-rharrison-ldap-extpartresp-xx.txt

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1999-12-14 08:51:15 +08:00
Individual Submission to LDAPExt Working Group R. Harrison
Internet Draft Novell, Inc.
Document: draft-rharrison-ldap-extpartresp-00.txt October, 1999
Category: Proposed Standard
Extended Partial Response
Protocol Enhancement to LDAP v3
Status of this Memo
This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026 [1].
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that
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progress."
The list of current Internet-Drafts can be accessed at
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The list of Internet-Draft Shadow Directories can be accessed at
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1. Abstract
This document describes the ExtendedPartialResponse, an element of
LDAP v3 protocol which allows multiple responses to LDAP v3 extended
requests. Extended partial responses are backward compatible with
the existing LDAP v3 Extended Operation defined in [LDAPv3].
2. Conventions used in this document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in
this document are to be interpreted as described in [RFC2119].
3. Motivation for the Extended Partial Response
The Extended Operation ([LDAPv3] Section 4.12) was defined in LDAP
v3 to allow additional operations to be defined as part of the
protocol without requiring a new revision of the protocol.
The LDAP v3 Extended Operation allows for a single extended response
to each extended request, but this paradigm may not be efficient
enough for some directory operations. For instance, the LDAP search
operation is a directory operation that is much more efficient when
multiple partial responses are used to service a single request. The
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LDAP v3 Extended Partial Response October, 1999
extended partial response generalizes the current extended operation
definition to give LDAP server implementers the ability to make use
of a single-request-multiple-response paradigm for extended LDAP
operations that would benefit from it.
4. Element of Protocol
The ExtendedPartialResponse is defined as
ExtendedPartialResponse ::= [APPLICATION 25] SEQUENCE {
responseName [0] LDAPOID,
response [1] OCTET STRING OPTIONAL }
An LDAP server responds to an LDAP v3 ExtendedRequest with zero or
more ExtendedPartialResponses followed by one ExtendedResponse. This
ensures backward compatibility with existing LDAP extensions which
do not make use of the ExtendedPartialResponse. As with all LDAP
extensions, LDAP extensions that make use of the
ExtendedPartialResponse have predefined syntax and semantics that
are defined in RFCs or are private to a particular implementation.
5. Security Considerations
This draft describes an enhancement to the LDAP v3 protocol
[LDAPv3]. All security considerations of [LDAPv3] apply to this
draft, however it does not introduce any new security considerations
to the LDAP v3 protocol.
6. References
[LDAPv3]
Wahl, M., Howes, T., and S. Kille, "Lightweight Directory
Access Protocol (v3)", RFC 2251, December 1997.
[ReqsKeywords]
Scott Bradner. "Key Words for use in RFCs to Indicate
Requirement Levels". RFC 2119.
7. Acknowledgments
The author would like to acknowledge the readers of the LDAP
Extensions working group mail list who responded to the suggestion
that a multiple-response paradigm might be useful for LDAP extended
requests. Special thanks go to two individuals: David Wilbur who
first introduced the idea on the working group list, and Thomas
Salter, who succinctly summarized the discussion and suggested the
name ExtendedPartialResponse in his summary.
8. Author's Addresses
Roger Harrison
Novell, Inc.
Harrison Individual Submission <20> Expires April 14, 2000 2
LDAP v3 Extended Partial Response October, 1999
122 E. 1700 S.
Provo, UT 84606
+1 801 861 2642
roger_harrison@novell.com
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