1、INCITS/ISO/IEC 19757-4:20062008 (ISO/IEC 19757-4:2006, IDT) Information technology Document Schema DefinitionLanguages (DSDL) Part 4: Namespace-based ValidationDispatching Language (NVDL)INCITS/ISO/IEC 19757-4:20062008(ISO/IEC 19757-4:2006, IDT)Copyright American National Standards Institute Provide
2、d by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-INCITS/ISO/IEC 19757-4:20062008 ii ITIC 2008 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may
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5、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. Adopted by INCITS (InterNational Committee for Information Technology Standards) as an American National Standard. Date of AN
6、SI Approval: 7/1/2008 Published by American National Standards Institute, 25 West 43rd Street, New York, New York 10036 Copyright 2008 by Information Technology Industry Council (ITI). All rights reserved. These materials are subject to copyright claims of International Standardization Organization
7、(ISO), International Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information Technology Industry Council (ITI). Not for resale. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written perm
8、ission of ITI. All requests pertaining to this standard should be submitted to ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of America Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking pe
9、rmitted without license from IHS-,-,-iiiContents PageForeword vIntroduction vi1 Scope. 12 Normative references 13 Terms and definitions. 24 Notation 35 Data model. 35.1 General. 35.2 Creating a data model from the infoset. 46 Syntax 66.1 General. 66.2 Full syntax. 66.3 Simple syntax 86.4 Simplificat
10、ion. 106.4.1 General. 106.4.2 Annotations. 106.4.3 Whitespace 106.4.4 message attribute 106.4.5 mustSupport attribute. 106.4.6 schemaType attribute of rules elements 116.4.7 rules without mode children. 116.4.8 child mode elements of validate, allow, reject, attach, unwrap, attachPlaceholder, or con
11、text elements 116.4.9 namespace or anyNamespace elements 116.4.10 mode inclusion 116.4.11 competition within mode . 126.4.12 default anyNamespace .126.4.13 allow and reject .126.4.14 useMode attribute. 137 Primitive operations 137.1 General. 137.2 Creating element sections and attribute sections. 13
12、7.3 Decomposition of element sections by trigger elements 157.4 Attaching attribute sections to elements 177.5 Attaching element sequences to elements. 177.6 Creating placeholder elements from element sections. 187.7 Converting attribute sections to empty elements 188 Semantics 188.1 General. 188.2
13、Preliminaries 198.3 Stage 1: Creating element and attribute sections 208.4 Stage 2: Constructing interpretations. 208.5 Stage 3: Combining sections. 208.6 Stage 4: Filtering of the combined sections. 228.7 Stage 5: Validation 228.7.1 General. 228.7.2 Determining schemas and schema languages 228.7.3
14、Schema rewriting for attribute sections 238.7.4 Options. 239 Conformance. 23INCITS/ISO/IEC 19757-4:20062008 ITIC 2008 All rights reserved Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from
15、 IHS-,-,-iv C.2 RELAX NG schema. 35C.3 NVDL script 40Annex D (informative) Example 42D.1 General. 42D.2 RDF embedded within XHTML. 42D.2.1 Simplification. 42D.2.2 Dispatching 43D.2.2.1 General. 43D.2.2.2 Stage 1. 43D.2.2.3 Stage 2. 44D.2.2.4 Stage 3. 44D.2.2.5 Stage 4. 44D.2.2.6 Stage 5. 44D.3 XHTML
16、 2.0 and XForms 44D.3.1 Simplification . 44D.3.2 Dispatching 47D.3.2.1 General. 47D.3.2.2 Stage 1. 47D.3.2.3 Stage 2. 47D.3.2.4 Stage 3. 48D.3.2.5 Stage 4. 48D.3.2.6 Stage 5. 49Bibliography. 50Annex A (normative) Full syntax in RELAX NG 24Annex B (normative) Simple syntax in RELAX NG 31Annex C (info
17、rmative) An NVDL script and RELAX NG schema for the full syntax 35C.1 General. 35INCITS/ISO/IEC 19757-4:20062008 ITIC 2008 All rights reservedCopyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license
18、from IHS-,-,-vForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards
19、through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC,
20、also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to
21、prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibili
22、ty that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 19757-4 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 34, Document de
23、scription and processing languages. ISO/IEC 19757 consists of the following parts, under the general title Information technology Document Schema Definition Languages (DSDL): Part 1: Overview Part 2: Regular-grammar-based validation RELAX NG Part 3: Rule-based validation Schematron Part 4: Namespace
24、-based Validation Dispatching Language (NVDL) The following parts are under preparation: Part 5: Datatypes Part 6: Path-based integrity constraints Part 7: Character repertoire description language CRDL Part 8: Document schema renaming language DSRL Part 9: Datatype- and namespace-aware DTDs Part 10
25、: Validation management INCITS/ISO/IEC 19757-4:20062008 ITIC 2008 All rights reserved Copyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-vi IntroductionISO/IEC 19757 defines a set
26、of Document Schema Definition Languages (DSDL) that can be used to specify oneor more validation processes performed against Extensible Markup Language (XML) documents. A number ofvalidation technologies are standardized in DSDL to complement those already available as standards or fromindustry.The
27、main objective of ISO/IEC 19757 is to bring together different validation-related technologies to form a singleextensible framework that allows technologies to work in series or in parallel to produce a single or a set ofvalidation results. The extensibility of DSDL accommodates validation technolog
28、ies not yet designed or specified.The motivations of this part of ISO/IEC 19757 are twofold. One is to allow the interworking of schemas describingdifferent markup vocabularies. The other is to allow these schemas to be written in different schema languages. Forthis purpose, this part of ISO/IEC 197
29、57 specifies a Namespace-based Validation Dispatching Language (NVDL).The structure of this part of ISO/IEC 19757 is as follows. Clause 5 describes the data model, which is theabstraction of an XML document used throughout the rest of the document. Clause 6 describes the full syntax andthe simple sy
30、ntax of NVDL scripts, and further describes the transformation from the full syntax to the simplesyntax. Clause 7 describes primitive operations for the NVDL data model, which are used for defining the NVDLsemantics. Clause 8 describes the semantics of a correct NVDL script in the simple syntax; the
31、 semantics specifyhow elements and attributes in a given document are dispatched to different validators and which schema is usedby each of these validators. Clause 9 describes conformance requirements for NVDL dispatchers. Annex A andAnnex B define the full syntax and the simple syntax using RELAX
32、NG, respectively. Annex C defines the fullsyntax using NVDL and RELAX NG. Finally, Annex D provides examples of the application of NVDL.The origin of NVDL is JIS TR X 00444, which was created and then submitted to ISO/IEC JTC1 as a fast-trackISO/IEC DTR 22250-25 by the Japanese national member body
33、for SC 34.INCITS/ISO/IEC 19757-4:20062008 ITIC 2008 All rights reservedCopyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMERICAN NATIONAL STANDARD INCITS/ISO/IEC 19757-4:20062008
34、1Information technology Document Schema Definition Languages (DSDL) Part 4: Namespace-based Validation Dispatching Language (NVDL) 1 ScopeThis part of ISO/IEC 19757 specifies a Namespace-based Validation Dispatching Language (NVDL). An NVDLscript controls the dispatching of elements or attributes in
35、 a given XML document to different validators,depending on the namespaces of the elements or attributes. An NVDL script also specifies which schemas areused by these validators. These schemas may be written in any schema languages, including those specified byISO/IEC 19757.2 Normative referencesThe
36、following referenced documents are indispensable for the application of this document. For dated references,only the edition cited applies. For undated references, the latest edition of the referenced document (including anyamendments) applies.NOTE Each of the following documents has a unique identi
37、fier that is used to cite the document in the text. The uniqueidentifier consists of the part of the reference up to the first comma.ISO/IEC 19757-2, Information technology Document Schema Definition Languages (DSDL) Part 2:Regular-grammar-based validation RELAX NGW3C XML, Extensible Markup Language
38、 (XML) 1.0 (Third Edition), W3C Recommendation, 04 February 2004,available at http:/www.w3.org/TR/2004/REC-xml-20040204/W3C XML-Names, Namespaces in XML, W3C Recommendation, 14 January 1999, available athttp:/www.w3.org/TR/1999/REC-xml-names-19990114/W3C XML-Infoset, XML Information Set (Second Edit
39、ion), W3C Recommendation, 4 February 2004, available athttp:/www.w3.org/TR/2004/REC-xml-infoset-20040204/W3C XML Schema Part 2, XML Schema Part 2: Datatypes (Second Edition), W3C Recommendation, 28 October2004, available at http:/www.w3.org/TR/2004/REC-xmlschema-2-20041028/IETF RFC 2045, Multipurpos
40、e Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies,Internet Standards Track Specification, November 1996, available at http:/www.ietf.org/rfc/rfc2045.txtIETF RFC 2046, Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types, Internet Standards TrackSpecification
41、, November 1996, available at http:/www.ietf.org/rfc/rfc2046.txtIETF RFC 3023, XML Media Types, Internet Standards Track Specification, August 1998, available athttp:/www.ietf.org/rfc/rfc3023.txtIETF RFC 3986, Uniform Resource Identifiers (URI): Generic Syntax, Internet Standards Track Specification
42、,January 2005, available at http:/www.ietf.org/rfc/rfc3986.txtIETF RFC 3987, Internationalized Resource Identifiers (IRIs), Internet Standards Track Specification, January2005, available at http:/www.ietf.org/rfc/rfc3987.txt ITIC 2008 All rights reserved Copyright American National Standards Institu
43、te Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-2 For the purposes of this document, the terms and definitions given in ISO/IEC 19757-2 and the following apply.NOTE Where a term is defined in this part of ISO/IEC 19757 and
44、 in ISO/IEC 19757-2, the definition given in this part ofISO/IEC 19757 applies.3.1actiona validate, reject, allow, attach, unwrap, cancelNestedActions, or attachPlaceholder element within an NVDL script3.2attribute sectiona non-empty set of attributes having the same namespace name3.3attribute slot
45、nodea slot for an attribute section3.4NVDL dispatchersoftware module that determines whether an NVDL script is correct, creates validation candidates from aninstance, and invokes validators for these validation candidates3.5element sectionan element such that a single namespace name applies to itsel
46、f and all descendant elements3.6element slot nodea slot for an element section3.7full syntaxsyntax of an NVDL script before simplification3.8instanceXML document from which validation candidates are created3.9media typea two-part identifier specifying the nature of the referenced data3.10modea mappi
47、ng from namespaces to actions3.11NVDL data modelabstract representation of an XML document defined by this part of ISO/IEC 197573.12NVDL scriptspecification for namespace-based validation dispatching3.13parent element sectionan element section containing a slot node for another section3.14path expre
48、ssiona list of one or more choices separated by |, where each choice is a list of one or more NCName tokens separatedby /, optionally preceded by /3 Terms and definitionsINCITS/ISO/IEC 19757-4:20062008 ITIC 2008 All rights reservedCopyright American National Standards Institute Provided by IHS under license with ANSI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-33.15RELAX NG data modelabstract representation of an XML document defined by ISO/IEC 19757-23.16sectioneither an attribute
