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It was the first separate schema language for XML to achieve Recommendation status by the W3C. Because of confusion between XML Schema as a specific W3C specification, and the use of the same term to describe schema languages in general, some parts of the user community referred to this language as WXS, an initialism for W3C XML Schema, while ...
MARCXML - a direct mapping of the MARC standard to XML syntax; METS - a schema for aggregating in a single XML file descriptive, administrative, and structural metadata about a digital object; MODS - a schema for a bibliographic element set and maintained by the Network Development and MARC Standards Office of the Library of Congress [6]
The process of checking to see if a XML document conforms to a schema is called validation, which is separate from XML's core concept of syntactic well-formedness.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.
ODD: A 'One Document Does-it-all' TEI format for simultaneously recording project documentation and meta-schema definition from which you can generate RELAX NG, W3C XML Schema, and DTDs as well as formatted documentation. ODRL: an XML-based standard Rights Expression Language (REL) used in digital rights management systems
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. [1] The standard is versatile, allowing for programming concepts such as inheritance and type creation, but it is complex.
The Roma web application [17] is built around the ODD format and can use it to generate schemas in DTD, W3C XML Schema, Relax NG Compact Syntax, or Relax NG XML Syntax formats, as used by many XML validation tools and services. ODD is the format used internally by the Text Encoding Initiative for the TEI technical standard. [18]
Document Structure Description, or DSD, is a schema language for XML, that is, a language for describing valid XML documents. It's an alternative to DTD or the W3C XML Schema . An example of DSD in its simplest form:
An XML Schema Definition is itself an XML document while a DTD is not. RELAX NG, which is also a part of DSDL, is an ISO international standard. [9] It is more expressive than XSD, [citation needed] while providing a simpler syntax, [citation needed] but commercial software support has been slow in coming.