One document matched: draft-legg-xed-asd-gserei-03.txt
Differences from draft-legg-xed-asd-gserei-02.txt
INTERNET-DRAFT S. Legg
draft-legg-xed-asd-gserei-03.txt eB2Bcom
Intended Category: Standards Track December 22, 2006
Abstract Syntax Notation X (ASN.X) Representation
of Encoding Instructions for
the Generic String Encoding Rules (GSER)
Copyright (C) The IETF Trust (2006).
Status of This Memo
By submitting this Internet-draft, each author represents that any
applicable patent or other IPR claims of which he or she is aware
have been or will be disclosed, and any of which he or she becomes
aware will be disclosed, in accordance with Section 6 of BCP 79.
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/1id-abstracts.html
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html
Technical discussion of this document should take place on the XED
developers mailing list <xeddev@eb2bcom.com>. Please send editorial
comments directly to the editor <steven.legg@eb2bcom.com>. Further
information is available on the XED website: www.xmled.info.
This Internet-Draft expires on 22 June 2007.
Abstract
Abstract Syntax Notation X (ASN.X) is an Extensible Markup Language
(XML) representation for Abstract Syntax Notation One (ASN.1)
specifications. This document specifies the ASN.X representation of
encoding instructions for the Generic String Encoding Rules (GSER).
Legg Expires 22 June 2007 [Page 1]
INTERNET-DRAFT ASN.X: GSER Encoding Instructions December 22, 2006
Table of Contents
1. Introduction ....................................................2
2. Conventions .....................................................3
3. EncodingInstructionAssignmentList Translation ...................3
4. EncodingInstruction Translation .................................3
4.1. ChoiceOfStringsInstruction Translation .....................4
5. Security Considerations .........................................4
6. IANA Considerations .............................................5
7. Normative References ............................................5
Appendix A. ASN.1 for GSER Encoding Instruction Notation ...........6
Appendix B. ASN.X for GSER Encoding Instruction Notation ...........7
1. Introduction
Abstract Syntax Notation X (ASN.X) [ASN.X] is an Extensible Markup
Language (XML) [XML10][XML11] representation for Abstract Syntax
Notation One (ASN.1) [X.680] specifications. The ASN.X
representation for the ASN.1 basic notation [X.680] [X.680-1] is
described elsewhere [ASN.X].
The grammar of ASN.1 permits the application of encoding instructions
[X.680-1], through type prefixes and encoding control sections, that
modify how abstract values are encoded by nominated encoding rules.
The generic notation for type prefixes and encoding control sections
is defined by the ASN.1 basic notation, however the notation for
specific encoding instructions, i.e., the EncodingInstruction and
EncodingInstructionAssignmentList productions of the notation, are
defined separately for each set of encoding rules using encoding
instructions. This document specifies the ASN.X representation for
EncodingInstructionAssignmentList and EncodingInstruction as they are
defined for the Generic String Encoding Rules (GSER) [GSER][GSEREI].
ASN.X is defined in terms of rules for translating from an ASN.1
specification. This does not preclude an ASN.X module being written
directly without a pre-existing ASN.1 module, however such an ASN.X
module is considered valid if and only if there exists, in principle,
an ASN.1 module that when translated would yield the ASN.X module.
By design, an ASN.X module is also the Robust XML Encoding Rules
(RXER) [RXER] encoding of an ASN.1 value. The ASN.1 type definitions
for such values, insofar as they pertain to the ASN.1 basic notation,
are provided elsewhere [ASN.X], however this document provides the
ASN.1 type definitions for representing GSER encoding instructions as
abstract values. These definitions appear in Appendix A.
The ASN.X translation of the ASN.1 module in Appendix A is presented
Legg Expires 22 June 2007 [Page 2]
INTERNET-DRAFT ASN.X: GSER Encoding Instructions December 22, 2006
in Appendix B.
The General Considerations of the specification for ASN.X [ASN.X]
also apply here.
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 BCP 14, RFC 2119 [BCP14]. The key
word "OPTIONAL" is exclusively used with its ASN.1 meaning.
A reference to an ASN.1 production [X.680] (e.g., Type, NamedType) is
a reference to the text in an ASN.1 specification corresponding to
that production.
The description of the translation of GSER encoding instructions into
ASN.X makes use of definitions from the XML Information Set (Infoset)
[INFOSET]. In particular, information item property names follow the
Infoset convention of being shown in square brackets, e.g.,
[local name]. Literal values of Infoset properties are enclosed in
double quotes, however the double quotes are not part of the property
values. In the sections that follow, "information item" will be
abbreviated to "item", e.g., "element information item" is
abbreviated to "element item". Element items will be referred to by
their [local name] in angle brackets, e.g., "the <type> element item"
means the element item with the [local name] "type".
3. EncodingInstructionAssignmentList Translation
As described in the specification for ASN.X [ASN.X], the translation
of an EncodingControlSection for GSER is an element item with the
[local name] "GSER". The translation of the
EncodingInstructionAssignmentList in such an EncodingControlSection
determines the content of the <GSER> element item.
The EncodingInstructionAssignmentList for GSER is currently defined
to be empty [GSEREI], therefore the [attributes] and [children] of
the <GSER> element item are both empty.
4. EncodingInstruction Translation
The translation of an EncodingInstruction for GSER can appear in the
translation of an EncodingPrefix. The translation for an
EncodingPrefix is described by the specification for ASN.X.
The translation of an EncodingInstruction for GSER is the translation
of the ChoiceOfStringsInstruction in the EncodingInstruction
Legg Expires 22 June 2007 [Page 3]
INTERNET-DRAFT ASN.X: GSER Encoding Instructions December 22, 2006
(currently the only defined encoding instruction for GSER).
4.1. ChoiceOfStringsInstruction Translation
The translation of a ChoiceOfStringsInstruction is an element item
with the [local name] "choiceOfStrings".
If the ChoiceOfStringsInstruction has an AlternativesPrecedence, then
an attribute item with the [local name] "precedence" SHALL be added
to the [attributes] of the <choiceOfStrings> element item. The
[normalized value] of this attribute item is the white space
separated list of qualified names for the expanded names [XMLNS10] of
the NamedType instances (see [RXEREI]) corresponding to the
identifiers nested in the PrecedenceList in the
AlternativesPrecedence.
Example
[GSER:CHOICE-OF-STRINGS PRECEDENCE utf8 visible] CHOICE {
visible [RXER:NAME "ascii"] VisibleString,
utf8 UTF8String
}
<type xmlns:asnx="urn:ietf:params:xml:ns:asnx">
<prefixed>
<GSER><choiceOfStrings precedence="utf8 ascii"/></GSER>
<type>
<choice>
<element name="ascii" identifier="visible"
type="asnx:VisibleString"/>
<element name="utf8" type="asnx:UTF8String"/>
</choice>
</type>
</prefixed>
</type>
5. Security Considerations
The ASN.X translation of a GSER encoding instruction is semantically
equivalent to the original GSER encoding instruction. The security
considerations that apply to an application built from an original
ASN.1 specification with GSER encoding instructions apply equally to
an application built from the ASN.X translation of the ASN.1
specification.
See the main specification for ASN.X [ASN.X] for security
considerations related to ASN.X modules.
Legg Expires 22 June 2007 [Page 4]
INTERNET-DRAFT ASN.X: GSER Encoding Instructions December 22, 2006
6. IANA Considerations
This document has no actions for the Internet Assigned Numbers
Authority (IANA).
7. Normative References
[BCP14] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[GSER] Legg, S., "Generic String Encoding Rules (GSER) for ASN.1
Types", RFC 3641, October 2003.
[GSEREI] Legg, S., "Encoding Instructions for the Generic String
Encoding Rules (GSER)", draft-legg-ldap-gser-ei-xx.txt, a
work in progress, August 2006.
[RXER] Legg, S. and D. Prager, "Robust XML Encoding Rules (RXER)
for Abstract Syntax Notation One (ASN.1)",
draft-legg-xed-rxer-xx.txt, a work in progress, December
2006.
[RXEREI] Legg, S., "Encoding Instructions for the Robust XML
Encoding Rules (RXER)", draft-legg-xed-rxer-ei-xx.txt, a
work in progress, December 2006.
[ASN.X] Legg, S., "Abstract Syntax Notation X (ASN.X)",
draft-legg-xed-asd-xx.txt, a work in progress, December
2006.
[X.680] ITU-T Recommendation X.680 (07/02) | ISO/IEC 8824-1,
Information technology - Abstract Syntax Notation One
(ASN.1): Specification of basic notation.
[X.680-1] ITU-T Recommendation X.680 (2002) Amendment 1 (10/03) |
ISO/IEC 8824-1:2002/Amd 1:2004, Support for EXTENDED-XER.
[XML10] Bray, T., Paoli, J., Sperberg-McQueen, C., Maler, E. and
F. Yergeau, "Extensible Markup Language (XML) 1.0 (Fourth
Edition)", W3C Recommendation,
http://www.w3.org/TR/2006/REC-xml-20060816, August 2006.
[XML11] Bray, T., Paoli, J., Sperberg-McQueen, C., Maler, E.,
Yergeau, F., and J. Cowan, "Extensible Markup Language
(XML) 1.1 (Second Edition)", W3C Recommendation,
http://www.w3.org/TR/2006/REC-xml11-20060816, August 2006.
[XMLNS10] Bray, T., Hollander, D., Layman, A., and R. Tobin,
Legg Expires 22 June 2007 [Page 5]
INTERNET-DRAFT ASN.X: GSER Encoding Instructions December 22, 2006
"Namespaces in XML 1.0 (Second Edition)", W3C
Recommendation,
http://www.w3.org/TR/2006/REC-xml-names-20060816, August
2006.
[INFOSET] Cowan, J. and R. Tobin, "XML Information Set (Second
Edition)", W3C Recommendation,
http://www.w3.org/TR/2004/REC-xml-infoset-20040204,
February 2004.
Appendix A. ASN.1 for GSER Encoding Instruction Notation
This appendix is normative.
GSER-EncodingInstructionNotation
{ iso(1) identified-organization(3) dod(6)
internet(1) private(4) enterprise(1)
xmled(21472) asnx(1) module(0) gser-ei-notation(2) }
-- Copyright (C) The IETF Trust (2006). This version of
-- this ASN.1 module is part of RFC XXXX; see the RFC itself
-- for full legal notices.
DEFINITIONS
RXER INSTRUCTIONS
AUTOMATIC TAGS
EXTENSIBILITY IMPLIED ::= BEGIN
IMPORTS
PrecedenceList
FROM AbstractSyntaxNotation-X
{ iso(1) identified-organization(3) dod(6)
internet(1) private(4) enterprise(1)
xmled(21472) asnx(1) module(0) notation(1) }
;
GSER-EncodingInstruction ::= [SINGULAR-INSERTIONS] CHOICE {
choiceOfStrings GSER-ChoiceOfStringsInstruction
}
GSER-EncodingInstructionAssignmentList ::= SEQUENCE { }
GSER-ChoiceOfStringsInstruction ::= SEQUENCE {
precedence [ATTRIBUTE] PrecedenceList OPTIONAL
}
ENCODING-CONTROL RXER
Legg Expires 22 June 2007 [Page 6]
INTERNET-DRAFT ASN.X: GSER Encoding Instructions December 22, 2006
SCHEMA-IDENTITY "urn:oid:1.3.6.1.4.1.21472.1.0.2"
TARGET-NAMESPACE "urn:ietf:params:xml:ns:asnx" PREFIX "asnx"
END
Appendix B. ASN.X for GSER Encoding Instruction Notation
This appendix is non-normative.
<?xml version="1.0"?>
<asnx:module xmlns:asnx="urn:ietf:params:xml:ns:asnx"
name="GSER-EncodingInstructionNotation"
identifier="1.3.6.1.4.1.21472.1.0.2"
schemaIdentity="urn:oid:1.3.6.1.4.1.21472.1.0.2"
targetNamespace="urn:ietf:params:xml:ns:asnx"
targetPrefix="asnx"
extensibilityImplied="true">
<annotation>
Copyright (C) The IETF Trust (2006). This version of
this ASN.X module is part of RFC XXXX; see the RFC itself
for full legal notices.
</annotation>
<import name="AbstractSyntaxNotation-X"
identifier="1.3.6.1.4.1.21472.1.0.1"
schemaIdentity="urn:oid:1.3.6.1.4.1.21472.1.0.1"
namespace="urn:ietf:params:xml:ns:asnx"/>
<namedType name="GSER-EncodingInstruction">
<type>
<choice insertions="singular">
<element name="choiceOfStrings"
type="asnx:GSER-ChoiceOfStringsInstruction"/>
</choice>
</type>
</namedType>
<namedType name="GSER-EncodingInstructionAssignmentList">
<type>
<sequence/>
</type>
</namedType>
<namedType name="GSER-ChoiceOfStringsInstruction">
<type>
<sequence>
<optional>
Legg Expires 22 June 2007 [Page 7]
INTERNET-DRAFT ASN.X: GSER Encoding Instructions December 22, 2006
<attribute name="precedence" type="asnx:PrecedenceList"/>
</optional>
</sequence>
</type>
</namedType>
</asnx:module>
Author's Address
Dr. Steven Legg
eB2Bcom
Suite 3, Woodhouse Corporate Centre
935 Station Street
Box Hill North, Victoria 3129
AUSTRALIA
Phone: +61 3 9896 7830
Fax: +61 3 9896 7801
EMail: steven.legg@eb2bcom.com
Full Copyright Statement
Copyright (C) The IETF Trust (2006).
This document is subject to the rights, licenses and restrictions
contained in BCP 78, and except as set forth therein, the authors
retain all their rights.
This document and the information contained herein are provided on an
"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND
THE INTERNET ENGINEERING TASK FORCE DISCLAIM 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.
Intellectual Property
The IETF takes no position regarding the validity or scope of any
Intellectual Property Rights 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; nor does it represent that it has
made any independent effort to identify any such rights. Information
on the procedures with respect to rights in RFC documents can be
found in BCP 78 and BCP 79.
Legg Expires 22 June 2007 [Page 8]
INTERNET-DRAFT ASN.X: GSER Encoding Instructions December 22, 2006
Copies of IPR disclosures made to the IETF Secretariat 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 implementers or users of this
specification can be obtained from the IETF on-line IPR repository at
http://www.ietf.org/ipr.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to implement
this standard. Please address the information to the IETF at
ietf-ipr@ietf.org.
Note to the RFC Editor: the remainder of this document is to be removed
before final publication.
Changes in Draft 01
The <encodingControl-GSER> element has been renamed to <GSER> and now
appears as a child element of an <encodingControls> element.
An insertion encoding instruction has been added to the ASN.1 for
GSER Encoding Instruction Notation to remove extension ambiguity.
Changes in Draft 02
The URL for the ASN.1 namespace has been replaced. A permanent URN
will be requested from the IANA.
Changes in Draft 03
The effective name definition has been replaced by the expanded name
definition from Namespaces in XML.
Legg Expires 22 June 2007 [Page 9]
| PAFTECH AB 2003-2026 | 2026-04-24 05:53:27 |