Commit f03c2925 authored by Kurt Zeilenga's avatar Kurt Zeilenga
Browse files

Add new CSN draft

Remove GSER drafts (now available as RFCs)
parent 2775c8d4
This diff is collapsed.
This diff is collapsed.
Internet-Draft Editor: J. Sermersheim
Intended Category: Experimental Novell, Inc
Document: draft-sermersheim-ldap-csn-00.txt Dec 2003
The LDAP Change Sequence Number Syntax and Matching Rules
Status of this Memo
This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that other
groups may also distribute working documents as Internet-Drafts.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html.
Distribution of this memo is unlimited. Technical discussion of this
document will take place on the IETF LDAP
Duplication/Replication/Update Protocols (ldup) mailing list <ietf-
ldup@imc.org>. Please send editorial comments directly to the editor
<jimse@novell.com>.
Abstract
This document defines a syntax schema element for the Lightweight
Directory Access Protocol ([LDAP]) which is used to hold a Change
Sequence Number (CSN). In general, a change sequence number
represents the place and time that a directory entity was changed. It
may be used by various attributes for various LDAP replication, and
synchronization applications.
Table of Contents
1. Introduction....................................................2
2. Conventions.....................................................2
3. Syntaxes........................................................2
3.1 ChangeSequenceNumber Syntax....................................2
3.2 UTF8String.....................................................3
4. Matching Rules..................................................3
4.1 changeSequenceNumberMatch Matching Rule........................3
Sermersheim Internet-Draft - Expires Jun 2004 Page 1
LDAP Change Sequence Number
4.2 utf8CodePointMatch Matching Rule...............................4
4.3 changeSequenceNumberOrderingMatch Matching Rule................4
4.4 utf8CodePointOrderingMatch Matching Rule.......................4
5. Security Considerations.........................................5
6. Acknowledgements................................................5
7. Normative References............................................5
8. Informative References..........................................6
9. IANA Considerations.............................................6
10. Editor's Address...............................................6
1. Introduction
A number of technologies have been documented, implemented and
experimented with which in one way or another seek to replicate, or
synchronize directory data. A common need among these technologies is
to determine which of two copies of an element represents the latest
or most authoritative data. Part of meeting this need involves
associating a change sequence number to an element copy at the time
of an update to that element. When replication or synchronization
occurs, the change sequence numbers associated with directory
elements can be used to decide which element's data will be copied to
the other element(s).
2. Conventions
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", and "MAY" in this document are
to be interpreted as described in [Keyword].
The General Considerations in Section 3.1 of [Syntaxes] apply to the
syntax definition in this document.
The terms "directory element" and "element" refer to data held in a
directory and may apply to an attribute value, attribute, entry, or
any other identifiable directory entity.
3. Syntaxes
3.1 ChangeSequenceNumber Syntax
A value of the ChangeSequenceNumber syntax is the time of a change
along with a replicaID which represents the Directory System Agent
(DSA) holding the element when it was changed. There are also two
sequence numbers used to disambiguate directory entities that are
changed at the same time and place.
The Abstract Syntax Notation One ([ASN.1]) type corresponding to this
syntax is defined as follows:
ChangeSequenceNumber ::= SEQUENCE {
time GeneralizedTime,
Sermersheim Internet-Draft - Expires Jun 2004 Page 2
LDAP Change Sequence Number
timeCount INTEGER (0 .. MaxInt),
replicaID UTF8String,
changeCount INTEGER (0 .. MaxInt)}
MaxInt INTEGER ::= 2147483647 -- (2^^31 - 1) --
GeneralizedTime is defined in [ASN.1]. Local time without a
differential SHALL NOT be used.
UTF8String is defined below.
The LDAP-specific encoding of a value of this syntax is the Generic
String Encoding Rules ([GSER]) encoding of the ASN.1 type.
Example:
{ time "196701160315-0700",
timeCount 0,
replicaID "DSA666",
changeCount 1 }
The following is an LDAP syntax description [RFC2252] suitable for
publication in the subschema.
( IANA-ASSIGNED-OID.1 DESC 'ChangeSequenceNumber' )
3.2 UTF8String
The UTF8String syntax is used to express a string of characters from
the [ISO10646] character set (a superset of [Unicode]), encoded
following the [UTF-8] algorithm. Note that Unicode characters U+0000
through U+007F are the same as ASCII 0 through 127, respectively, and
have the same single octet UTF-8 encoding. Other Unicode characters
have a multiple octet UTF-8 encoding.
UTF8String::= OCTET STRING -- UTF-8 encoded,
-- [ISO10646] characters
The LDAP-specific encoding of a value of this syntax are the UTF-8
characters themselves.
The following is an LDAP syntax description [RFC2252] suitable for
publication in the subschema.
( IANA-ASSIGNED-OID.2 DESC 'UTF8String')
4. Matching Rules
4.1 changeSequenceNumberMatch Matching Rule
The changeSequenceNumberMatch rule compares an assertion value of the
ChangeSequenceNumber syntax to a value of a syntax (e.g the
Sermersheim Internet-Draft - Expires Jun 2004 Page 3
LDAP Change Sequence Number
ChangeSequenceNumber syntax) whose corresponding ASN.1 type is
ChangeSequenceNumber.
The rule evaluates to TRUE if and only if each of the components of
the two values evaluate to true using the following rules:
- The time component uses generalizedTimeMatch.
- The timeCount and changeCount components use integerMatch.
- The replicaID component uses utf8CodePointMatch.
The following is a LDAP matching rule description [RFC2252] suitable
for publication in the subschema.
( IANA-ASSIGNED-OID.3 NAME changeSequenceNumberMatch
SYNTAX IANA-ASSIGNED-OID.1 )
4.2 utf8CodePointMatch Matching Rule
The utf8CodePointMatch rule compares an assertion value of the
UTF8String syntax to a value of a syntax (e.g the UTF8String syntax)
whose corresponding ASN.1 type is UTF8String. The rule evaluates to
TRUE if and only if the code points [Unicode] of each of the
characters is equal.
The following is a LDAP matching rule description [RFC2252] suitable
for publication in the subschema.
( IANA-ASSIGNED-OID.4 NAME utf8CodePointMatch
SYNTAX IANA-ASSIGNED-OID.2 )
4.3 changeSequenceNumberOrderingMatch Matching Rule
The changeSequenceNumberOrderingMatch rule compares the
ChangeSequenceNumber ordering of an assertion value of the
ChangeSequenceNumber syntax to a value of a syntax (e.g the
ChangeSequenceNumber syntax) whose corresponding ASN.1 type is
ChangeSequenceNumber.
The rule evaluates to TRUE if and only if each of the components of
the two values evaluate to true using the following rules:
- The time component uses GeneralizedTimeOrderingMatch.
- The timeCount and changeCount components use integerOrderingMatch.
- The replicaID component uses utf8CodePointOrderingMatch.
The following is a LDAP matching rule description [RFC2252] suitable
for publication in the subschema.
( IANA-ASSIGNED-OID.5 NAME changeSequenceNumberOrderingMatch
SYNTAX SYNTAX IANA-ASSIGNED-OID.1 )
4.4 utf8CodePointOrderingMatch Matching Rule
Sermersheim Internet-Draft - Expires Jun 2004 Page 4
LDAP Change Sequence Number
The utf8CodePointOrderingMatch rule compares the ordering of an
assertion value of the UTF8String syntax to a stored value of a
syntax (e.g the UTF8String syntax) whose corresponding ASN.1 type is
UTF8String.
The rule evaluates to TRUE if, and only if, in the code point
collation order, the stored value character string appears earlier
than the assertion value character string, i.e., the stored value is
"less than" the assertion value.
The following is a LDAP matching rule description [RFC2252] suitable
for publication in the subschema.
( IANA-ASSIGNED-OID.6 NAME utf8CodePointOrderingMatch
SYNTAX IANA-ASSIGNED-OID.2 )
5. Security Considerations
6. Acknowledgements
7. Normative References
[ABNF] Crocker, D. and P. Overell, "Augmented BNF for Syntax
Specifications: ABNF", RFC 2234, November 1997.
[ASN.1] ITU-T Recommendation X.680 (07/2002) | ISO/IEC 8824-1:2002
"Information Technology - Abstract Syntax Notation One
(ASN.1): Specification of basic notation"
[Keyword] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", RFC 2119, March 1997.
[Syntaxes] Legg, S., and K. Dally, "LDAP: Syntaxes and Matching
Rules", draft-ietf-ldapbis-syntaxes-xx.txt, (a work in
progress).
[Models] Zeilenga, K., "LDAP: Directory Information Models", draft-
ietf-ldapbis-models-xx.txt (a work in progress).
[ISO10646] Universal Multiple-Octet Coded Character Set (UCS) -
Architecture and Basic Multilingual Plane, ISO/IEC 10646-1
: 1993.
[Unicode] The Unicode Consortium, "The Unicode Standard, Version
3.2.0" is defined by "The Unicode Standard, Version 3.0"
(Reading, MA, Addison-Wesley, 2000. ISBN 0-201-61633-5),
as amended by the "Unicode Standard Annex #27: Unicode
3.1" (http://www.unicode.org/reports/tr27/) and by the
"Unicode Standard Annex #28: Unicode 3.2"
(http://www.unicode.org/reports/tr28/).
Sermersheim Internet-Draft - Expires Jun 2004 Page 5
LDAP Change Sequence Number
[RFC2252] Wahl, M., Coulbeck, A., Howes, T. and S. Kille,
"Lightweight Directory Access Protocol (v3): Attribute
Syntax Definitions", RFC 2252, December 1997.
8. Informative References
9. IANA Considerations
10. Editor's Address
Jim Sermersheim
Novell, Inc.
1800 South Novell Place
Provo, Utah 84606, USA
jimse@novell.com
+1 801 861-3088
Sermersheim Internet-Draft - Expires Jun 2004 Page 6
LDAP Change Sequence Number
Intellectual Property Rights
The IETF takes no position regarding the validity or scope of any
intellectual property or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; neither does it represent that it
has made any effort to identify any such rights. Information on the
IETF's procedures with respect to rights in standards-track and
standards-related documentation can be found in BCP-11. Copies of
claims of rights made available for publication and any assurances of
licenses to be made available, or the result of an attempt made to
obtain a general license or permission for the use of such
proprietary rights by implementors or users of this specification can
be obtained from the IETF Secretariat.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights which may cover technology that may be required to practice
this standard. Please address the information to the IETF Executive
Director.
Full Copyright Statement
Copyright (C) The Internet Society (2003). All Rights Reserved.
This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph are
included on all such copies and derivative works. However, this
document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of
developing Internet standards in which case the procedures for
copyrights defined in the Internet Standards process must be
followed, or as required to translate it into languages other than
English.
The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns.
This document and the information contained herein is provided on an
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Sermersheim Internet-Draft - Expires Jun 2004 Page 7
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment