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Topic: XML Schema Definition


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In the News (Wed 19 Nov 08)

  
 XML Schema Definition -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-29)
An XML Schema Definition (XSD) is an instance of an (additional info and facts about XML schema) XML schema written in the (additional info and facts about XML Schema) XML Schema language.
An XSD defines a type of (additional info and facts about XML) XML document in terms of constraints upon what elements and attributes may appear, their relationship to each other, what types of data may be in them, and other things.
XSDs were the first (additional info and facts about W3C) W3C-recommended (additional info and facts about XML schema) XML schemas to provide a namespace- and datatype-aware alternative to using XML's built-in (additional info and facts about Document Type Definition) Document Type Definitions (DTDs).
www.absoluteastronomy.com /encyclopedia/x/xm/xml_schema_definition2.htm   (192 words)

  
 Encyclopedia: XML Schema
XML Schema, published as a W3C Recommendation in May 2001, is one of several XML schema languages.
A Document Type Definition (DTD for short) is a set of declarations that conform to a particular markup syntax and that describe a class, or type, of SGML or XML documents, in terms of constraints on the structure of those documents.
After XML Schema-based validation, it is possible to express an XML document's structure and content in terms of the data model that was implicit during validation.
www.nationmaster.com /encyclopedia/XML-Schema   (766 words)

  
 XML Schema Part 1: Structures Second Edition
The purpose of an XML Schema: Structures schema is to define and describe a class of XML documents by using schema components to constrain and document the meaning, usage and relationships of their constituent parts: datatypes, elements and their content and attributes and their values.
The ·simple ur-type definition· is considered to have an unconstrained lexical space, and a value space consisting of the union of the value spaces of all the built-in primitive datatypes and the set of all lists of all members of the value spaces of all the built-in primitive datatypes.
XML Schema: Structures introduces a mechanism for signaling that an element should be accepted as ·valid· when it has no content despite a content type which does not require or even necessarily allow empty content.
www.w3.org /TR/xmlschema-1   (8925 words)

  
 XML Schema Part 2: Datatypes Second Edition
The goals of the XML Schema language are discussed in the XML Schema Requirements document.
[Definition:]   The ·atomic· or ·union· datatype that participates in the definition of a ·list· datatype is known as the itemType of that ·list· datatype.
[Definition:]   The datatypes that participate in the definition of a ·union· datatype are known as the memberTypes of that ·union· datatype.
www.w3.org /TR/xmlschema-2   (9338 words)

  
 Cover Pages: XML Schemas
XML Schema allows the author to determine which parts of a document may be validated, or identify parts of a document where a schema may apply.
XML Schema Part 1: Structures and XML Schema Part 2: Datatypes provide the complete normative description of the XML Schema definition language, and the primer describes the language features through numerous examples which are complemented by extensive references to the normative texts.
Since the XML Schema Recommendation (Part 0: Primer, Part 1: Structures, and Part 2: Datatypes) was first published in May, 2001, it has gained acceptance as the primary technology for specifying and constraining the structure of XML documents.
www.oasis-open.org /cover/schemas.html   (14472 words)

  
 XML.com: Using W3C XML Schema
The W3C XML Schema Definition Language is an XML language for describing and constraining the content of XML documents.
This article is an introduction to using W3C XML Schemas, and also includes a comprehensive reference to the Schema datatypes and structures.
There appears to be no special reason for this, but the W3C XML Schema Working Group has considered that it was simpler to impose a relative order to the definitions of the list of elements and attributes within a complex type, and that it was more natural to define the attributes after the elements.
www.xml.com /pub/a/2000/11/29/schemas/part1.html   (595 words)

  
 XML schema | TutorGig.co.uk Encyclopedia   (Site not responding. Last check: 2007-10-29)
An 'XML schema' is a description of a type of XML document, typically expressed in terms of constraints on the structure and content of documents of that type, above and beyond the basic syntax constraints imposed by XML itself.
XML's built-in Document Type Definition (DTD) language can be considered as a schema language, although it is inadequate for many purposes.
All XML documents must be well-formed, but it is not required that a document be valid unless the XML parser is "validating", in which case the document is also checked for conformance with its associated schema.
www.tutorgig.co.uk /ed/XML_schema   (452 words)

  
 XML Standards, W3C, XHTML, XML Schema Definition Language, Ruby Annotation
XML Schemas define the structure of XML documents and provide hooks to associate semantics with them.
Schemas are also the product of W3C, and as such, has been specified with the clear intent of integration with other Web standards such as XML Namespaces.
In this sense XML Schema makes it easier than it has ever been to define the elements and attributes in a namespace, and to validate documents which use multiple namespaces defined by different schemas.
www.gca.org /whats_xml/xml_files/issue28/xmlnews.htm   (734 words)

  
 Xml Schema High Technology News & Info   (Site not responding. Last check: 2007-10-29)
XML is commonly used in life science databases and is the underlying schema specified in the FDA's Center for Drug Evaluation and Research (CDER) electronic common technical document (eCTD), which is used for electronic drug submissions.
New DTD, W3C XML Schema schema and Schematron schema for Schematron 1.5.
XML Schema is a new and powerful standard for controlling document structure and content.
www.xml4.com /xml/xml-schema.html   (4260 words)

  
 WDVL: XML Schema and SOAP Resources
Abstract: "The presented specification allows legacy systems that may presently be unable to convert their DTD markup declarations to XML Schema, to utilize XML Schema conformant datatypes." See DT4DTD Java SDK and documentation and W3C's comment on DT4DTD submission.
XML.com: XML 2000 Focuses on XML Schema - December 2000; Eric van der Vlist for XML.com.
XML Spy by Altova is a Windows-only Integrated Development Environment (IDE) for XML that includes: XML editing and validation, Schema/DTD editing and validation, and XSL editing and transformation; supports DTD, DCD, XDR, BizTalk, and W3C XML Schemas.
wdvl.internet.com /Authoring/Languages/XML/Schema.html   (2545 words)

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