ISO/IEC 19757-2:2008

Information technology — Document Schema Definition Language (DSDL) — Part 2: Regular-grammar-based validation — RELAX NG

ISO/IEC 19757-2:2008 specifies RELAX NG, a schema language for XML. A RELAX NG schema specifies a pattern for the structure and content of an XML document. The pattern is specified by using a regular tree grammar. It establishes requirements for RELAX NG schemas and specifies when an XML document matches the pattern specified by a RELAX NG schema.

Technologies de l'information — Langage de définition de schéma de documents (DSDL) — Partie 2: Validation de grammaire orientée courante — RELAX NG

General Information

• Status: Published
• Publication Date: 09-Dec-2008
• ICS: 35.240.30 - IT applications in information, documentation and publishing
• Technical Committee: ISO/IEC JTC 1/SC 34 - Document description and processing languages
• Drafting Committee: ISO/IEC JTC 1/SC 34 - Document description and processing languages
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 12-Sep-2024

Relations

• Revises: ISO/IEC 19757-2:2003 - Information technology — Document Schema Definition Language (DSDL) — Part 2: Regular-grammar-based validation — RELAX NG
• Effective Date: 14-Aug-2008

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 19757-2
Second edition
2008-12-15
Information technology — Document
Schema Definition Language (DSDL) —
Part 2:
Regular-grammar-based validation —
RELAX NG
Technologies de l'information — Langage de définition de schéma de
documents (DSDL) —
Partie 2: Validation de grammaire orientée courante — RELAX NG

Reference number
©
ISO/IEC 2008
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO/IEC 2008
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO/IEC 2008 – All rights reserved

Contents Page
Foreword. iii
Introduction. iv
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 1
4 Notation. 4
4.1 EBNF. 4
4.2 Inference rules. 4
4.2.1 Variables. 4
4.2.2 Propositions. 5
4.2.3 Expressions. 6
5 Data model. 7
6 Full syntax. 8
7 Simplification. 9
7.1 General. 9
7.2 Annotations. 9
7.3 Whitespace. 9
7.4 datatypeLibrary attribute. 9
7.5 type attribute of value element. 10
7.6 href attribute. 10
7.7 externalRef element. 10
7.8 include element. 10
7.9 name attribute of element and attribute elements. 11
7.10 ns attribute. 11
7.11 QNames. 11
7.12 div element. 11
7.13 Number of child elements. 11
7.14 mixed element. 12
7.15 optional element. 12
7.16 zeroOrMore element. 12
7.17 Constraints. 12
7.18 combine attribute. 13
7.19 grammar element. 13
7.20 define and ref elements. 13
7.21 notAllowed element. 14
7.22 empty element. 14
8 Simple syntax. 14
9 Semantics. 15
9.1 Inference rules. 15
9.2 Name classes. 15
9.3 Patterns. 16
9.3.1 choice pattern. 16
9.3.2 group pattern. 16
9.3.3 empty pattern. 16
9.3.4 text pattern. 16
9.3.5 oneOrMore pattern. 17
9.3.6 interleave pattern. 17
9.3.7 element and attribute pattern. 17
9.3.8 data and value pattern. 18
9.3.9 Built-in datatype library. 18
9.3.10 list pattern. 19
9.4 Validity. 19
© ISO/IEC 2008 – All rights reserved iii

10 Restrictions. 19
10.1 General. 19
10.2 Prohibited paths. 19
10.2.1 General. 19
10.2.2 attribute pattern. 20
10.2.3 oneOrMore pattern. 20
10.2.4 list pattern. 20
10.2.5 except element in data pattern. 20
10.2.6 start element. 21
10.3 String sequences. 21
10.4 Restrictions on attributes. 23
10.5 Restrictions on interleave. 23
11 Conformance. 23
Annex A (normative) RELAX NG schema for RELAX NG. 24
Annex B (informative) Examples. 30
B.1 Data model. 30
B.2 Full syntax example. 31
B.3 Simple syntax example. 31
B.4 Validation example. 32
Annex C (normative) RELAX NG Compact syntax. 34
C.1 Introduction. 34
C.2 Syntax. 34
C.3 Lexical structure. 36
C.4 Declarations. 37
C.5 Annotations. 39
C.5.1 Support for annotations. 39
C.5.2 Initial annotations. 39
C.5.3 Documentation shorthand.
...

INTERNATIONAL ISO/IEC
STANDARD 19757-2
Second edition
2008-12-15
Information technology — Document
Schema Definition Language (DSDL) —
Part 2:
Regular-grammar-based validation —
RELAX NG
Technologies de l'information — Langage de définition de schéma de
documents (DSDL) —
Partie 2: Validation de grammaire orientée courante — RELAX NG

Reference number
©
ISO/IEC 2008
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO/IEC 2008
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO/IEC 2008 – All rights reserved

Contents Page
Foreword. iii
Introduction. iv
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 1
4 Notation. 4
4.1 EBNF. 4
4.2 Inference rules. 4
4.2.1 Variables. 4
4.2.2 Propositions. 5
4.2.3 Expressions. 6
5 Data model. 7
6 Full syntax. 8
7 Simplification. 9
7.1 General. 9
7.2 Annotations. 9
7.3 Whitespace. 9
7.4 datatypeLibrary attribute. 9
7.5 type attribute of value element. 10
7.6 href attribute. 10
7.7 externalRef element. 10
7.8 include element. 10
7.9 name attribute of element and attribute elements. 11
7.10 ns attribute. 11
7.11 QNames. 11
7.12 div element. 11
7.13 Number of child elements. 11
7.14 mixed element. 12
7.15 optional element. 12
7.16 zeroOrMore element. 12
7.17 Constraints. 12
7.18 combine attribute. 13
7.19 grammar element. 13
7.20 define and ref elements. 13
7.21 notAllowed element. 14
7.22 empty element. 14
8 Simple syntax. 14
9 Semantics. 15
9.1 Inference rules. 15
9.2 Name classes. 15
9.3 Patterns. 16
9.3.1 choice pattern. 16
9.3.2 group pattern. 16
9.3.3 empty pattern. 16
9.3.4 text pattern. 16
9.3.5 oneOrMore pattern. 17
9.3.6 interleave pattern. 17
9.3.7 element and attribute pattern. 17
9.3.8 data and value pattern. 18
9.3.9 Built-in datatype library. 18
9.3.10 list pattern. 19
9.4 Validity. 19
© ISO/IEC 2008 – All rights reserved iii

10 Restrictions. 19
10.1 General. 19
10.2 Prohibited paths. 19
10.2.1 General. 19
10.2.2 attribute pattern. 20
10.2.3 oneOrMore pattern. 20
10.2.4 list pattern. 20
10.2.5 except element in data pattern. 20
10.2.6 start element. 21
10.3 String sequences. 21
10.4 Restrictions on attributes. 23
10.5 Restrictions on interleave. 23
11 Conformance. 23
Annex A (normative) RELAX NG schema for RELAX NG. 24
Annex B (informative) Examples. 30
B.1 Data model. 30
B.2 Full syntax example. 31
B.3 Simple syntax example. 31
B.4 Validation example. 32
Annex C (normative) RELAX NG Compact syntax. 34
C.1 Introduction. 34
C.2 Syntax. 34
C.3 Lexical structure. 36
C.4 Declarations. 37
C.5 Annotations. 39
C.5.1 Support for annotations. 39
C.5.2 Initial annotations. 39
C.5.3 Documentation shorthand.
...