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XML Schema, published as a W3C recommendation in May 2001, [2] is one of several XML schema languages. It was the first separate schema language for XML to achieve Recommendation status by the W3C.
To accomplish this extension, a tightly controlled vocabulary (in the RSS world, "module"; in the XML world, "schema") is declared through an XML namespace to give names to concepts and relationships between those concepts. Some RSS 2.0 modules with established namespaces are: Media RSS (MRSS) 2.0 Module
W3C XML Schema is complex and hard to learn, although that is partially because it tries to do more than mere validation (see PSVI). Although being written in XML is an advantage, it is also a disadvantage in some ways. The W3C XML Schema language, in particular, can be quite verbose, while a DTD can be terse and relatively easily editable.
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 ]
XML Schema: 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 Script: an XML transformation language, or a Microsoft technology preview for scripting web browsers
RELAX NG schemas may be written in either an XML based syntax or a more compact non-XML syntax; the two syntaxes are isomorphic and James Clark's conversion tool—Trang—can convert between them without loss of information. RELAX NG has a simpler definition and validation framework than XML Schema, making it easier to use and implement.
The elements of the RSS vocabulary are not generally reusable in other XML vocabularies. The Atom syntax was specifically designed to allow elements to be reused outside the context of an Atom feed document. For instance, it is not uncommon to find atom:link elements being used within RSS 2.0 feeds.
.rss, .xml. Internet media type: application/rss+xml (Registration Being Prepared) [1] Extended from: XML: ... Here is a schema fragment for a GeoRSS GML encoding for ...