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XML Schema Definition
XSD (XML Schema Definition), a recommendation of the World Wide Web Consortium (W3C), specifies how to formally describe the elements in an Extensible Markup Language (XML) document. It can be used by programmers to verify each piece of item content in a document, to assure it adheres to the description of the element it is placed in. Like all XML schema languages, XSD can be used to express a set of rules to which an XML document must conform to be considered "valid" according to that schema. However, unlike most other schema languages, XSD was also designed with the intent that determination of a document's validity would produce a collection of information adhering to specific data types. Such a post-validation '' infoset'' can be useful in the development of XML document processing software. History XML Schema, published as a W3C recommendation in May 2001, is one of several XML schema languages. It was the first separate schema language for XML to achieve Recommendation st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Wide Web Consortium
The World Wide Web Consortium (W3C) is the main international standards organization for the World Wide Web. Founded in 1994 and led by Tim Berners-Lee, the consortium is made up of member organizations that maintain full-time staff working together in the development of standards for the World Wide Web. , W3C had 459 members. W3C also engages in education and outreach, develops software and serves as an open forum for discussion about the Web. History The World Wide Web Consortium (W3C) was founded in 1994 by Tim Berners-Lee after he left the European Organization for Nuclear Research (CERN) in October 1994. It was founded at the Massachusetts Institute of Technology (MIT) Laboratory for Computer Science with support from the European Commission, and the Defense Advanced Research Projects Agency, which had pioneered the ARPANET, one of the predecessors to the Internet. It was located in Technology Square until 2004, when it moved, with the MIT Computer Science and Artificial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Model
A data model is an abstract model that organizes elements of data and standardizes how they relate to one another and to the properties of real-world entities. For instance, a data model may specify that the data element representing a car be composed of a number of other elements which, in turn, represent the color and size of the car and define its owner. The term data model can refer to two distinct but closely related concepts. Sometimes it refers to an abstract formalization of the objects and relationships found in a particular application domain: for example the customers, products, and orders found in a manufacturing organization. At other times it refers to the set of concepts used in defining such formalizations: for example concepts such as entities, attributes, relations, or tables. So the "data model" of a banking application may be defined using the entity-relationship "data model". This article uses the term in both senses. A data model explicitly determines the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canonical Model
A canonical model is a design pattern used to communicate between different data formats. Essentially: create a data model which is a superset of all the others ("canonical"), and create a "translator" module or layer to/from which all existing modules exchange data with other modules. The individual modules can then be considered endpoints on an intelligent bus; the bus centralises all the data-translation intelligence. A form of enterprise application integration, it is intended to reduce costs and standardize on agreed data definitions associated with integrating business systems. A canonical model is any model that is canonical in nature, i.e. a model which is in the simplest form possible based on a standard, application integration (EAI) solution. Most organizations also adopt a set of standards for message structure and content (message payload). The desire for consistent message payload results in the construction of an enterprise or business domain canonical model c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unique Particle Attribution
The Unique Particle Attribution (UPA) rule is a mechanism to prevent ambiguity in W3C XML Schema version 1.0. Due to the UPA rule the XML schema fragment given below is prohibited: Given the XML instance fragment: 42 it is ambiguous whether should be associated with the element declaration (xsd:element name="x"), or the wildcard (xsd:any). This ambiguity violates the UPA rule and the corresponding XML schema therefore needs to be rejected by XML schema processors compliant to W3C XML Schema XSD (XML Schema Definition), a recommendation of the World Wide Web Consortium ( W3C), specifies how to formally describe the elements in an Extensible Markup Language (XML) document. It can be used by programmers to verify each piece of item con ... version 1.0. This particular example no longer violates the Unique Particle Attribute constraint in XML Schema version 1.1, which disambiguates it by saying that when an element matches both an element particle and a wildcar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
XML Schema Languages
An XML schema is a description of a type of Extensible Markup Language, XML document, typically expressed in terms of constraints on the structure and content of documents of that type, above and beyond the basic syntactical constraints imposed by XML itself. These constraints are generally expressed using some combination of grammatical rules governing the order of elements, Boolean predicates that the content must satisfy, data types governing the content of elements and attributes, and more specialized rules such as uniqueness quantification, uniqueness and referential integrity constraints. There are languages developed specifically to express XML schemas. The document type definition (DTD) language, which is native to the XML specification, is a schema language that is of relatively limited capability, but that also has other uses in XML aside from the expression of schemas. Two more expressive XML schema languages in widespread use are XML Schema (W3C), XML Schema (with a c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
XML Schema Editors
The W3C's XML Schema Recommendation defines a formal mechanism for describing XML documents. The standard has become popular and is used by the majority of standards bodies when describing their data. The standard is versatile, allowing for programming concepts such as inheritance and type creation, but it is complex. The standard itself is highly technical and published in 3 different parts, making it difficult to understand without committing large amounts of time. XML schema editor tools The problems users face when working with the XSD standard can be mitigated with the use of graphical editing tools. Although any text-based editor can be used to edit an XML Schema, a graphical editor offers advantages; allowing the structure of the document to be viewed graphically and edited with validation support, entry helpers and other useful features. Editors that have been developed so far take several different approaches to the presentation of information: Text view The text view o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Types Of XML Schemas
This is a list of notable XML schemas in use on the Internet sorted by purpose. XML schemas can be used to create XML documents for a wide range of purposes such as syndication, general exchange, and storage of data in a standard format. Bookmarks * XBEL - XML Bookmark Exchange Language Brewing *BeerXML - a free XML based data description standard for the exchange of brewing data Business *Auto-lead Data Format - for communicating consumer purchase requests to automotive dealerships. * ACORD data standards - Insurance Industry XML schemas specifications by Association for Cooperative Operations Research and Development * Europass XML - XML vocabulary describing the information contained in a Curriculum Vitae (CV), Language Passport (LP) and European Skills Passport (ESP) * OSCRE - Open Standards Consortium for Real Estate format for data exchange within the real estate industry * UBL - Defining a common XML library of business documents (purchase orders, invoices, etc.) by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schematron
Schematron is a rule-based validation language for making assertions about the presence or absence of patterns in XML trees. It is a structural schema language expressed in XML using a small number of elements and XPath. In many implementations, the Schematron schema XML is processed into normal XSLT code for deployment anywhere that XSLT can be used. Schematron is capable of expressing constraints in ways that other XML schema languages like XML Schema and DTD cannot. For example, it can require that the content of an element be controlled by one of its siblings. Or it can request or require that the root element, regardless of what element that is, must have specific attributes. Schematron can also specify required relationships between multiple XML files. Constraints and content rules may be associated with "plain-English" (or any language) validation error messages, allowing translation of numeric Schematron error codes into meaningful user error messages. The current ISO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Webber
David R.R. Webber (born 1955) is an Information technologist specializing in applications of XML, ebXML and EDI to standards-based information exchanges. He is a senior member of the ACM since 2007. David Webber is one of the originators of the ebXML initiative for global electronic business via the internet. He is holder of two U.S. Patents (5909570, 6418400) for electronic information exchange transformation and those patents are now cited widely by 37 other patents. David Webber has implemented several unique groundbreaking computer solutions in his career including the world's first airport gate scheduling system (King Khalid International Airport, Riyadh, 1987), the SeeMail email client for MCIMail written in Prolog, the patented GoXML system for XMLGlobal, the ShroudIt obfuscation system for LNK Corp, and the VisualScript tool for Smartdraw Inc. More recently David has contributed to open XML standards development with OASIS as technical editor for BCM (Business Centric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rick Jelliffe
Richard (Rick) Alan Jelliffe (born 1960) is an Australian programmer and standards activist (ISO, W3C, IETF), particularly associated with web standards, markup languages, internationalization and schema languages. He is the founder and Chief Technical Officer of Topologi Pty. Ltd, an XML tools vendor in Sydney. He has a degree in economics from the University of Sydney. Career Jelliffe is the inventor of the Schematron schema language; its core idea of using XPath to state constraints has been widely adopted and adapted. He is the editor of the ISO International Standard 19757-3 ''Document Schema Definition Languages - Part 3: Path Based Rule Languages (Schematron).'' In 1999-2001 Jelliffe worked at Academia Sinica, Taipei, Taiwan. ThChinese XML Now!website provides Chinese and English information and test files on XML. Jelliffe has also made an English/Chinese multilingual typesetting system used to publish PRC trade laws. He has been an invited expert on Internationalization t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RELAX NG
In computing, RELAX NG (REgular LAnguage for XML Next Generation) is a schema language for XML—a RELAX NG schema specifies a pattern for the structure and content of an XML document. A RELAX NG schema is itself an XML document but RELAX NG also offers a popular compact, non-XML syntax. Compared to other XML schema languages RELAX NG is considered relatively simple. It was defined by a committee specification of the OASIS RELAX NG technical committee in 2001 and 2002, based on Murata Makoto's RELAX and James Clark's TREX, and also by part two of the international standard ISO/IEC 19757: Document Schema Definition Languages ( DSDL). ISO/IEC 19757-2 was developed by ISO/IEC JTC 1/SC 34 and published in its first version in 2003. Schema examples Suppose we want to define an extremely simple XML markup scheme for a book: a book is defined as a sequence of one or more pages; each page contains text only. A sample XML document instance might be: This is page one. This is pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Clark (XML Expert)
James Clark (born 23 February 1964) is a software engineer and creator of various open-source software including groff, expat and several XML specifications. Education and early life Clark was born in London and educated at Charterhouse School and Merton College, Oxford where he studied Mathematics and Philosophy. Career Clark has lived in Bangkok, Thailand since 1995, and is permanent Thai resident. He owns a company called Thai Open Source Software Center, which provides him a legal framework for his open-source activities. Clark is the author and creator of groff, as well as an XML editing mode for GNU Emacs. Work on XML Clark served as technical lead of the working group that developed XML—notably contributing the self-closing, empty element tag syntax, and the name XML. His contributions to XML are cited in dozens of books on the subject. Clark is the author or co-author of a number of influential specifications and implementations, including: * DSSSL: An SG ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
