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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.
XSD (XML Schema Definition), a recommendation of the World Wide Web Consortium , specifies how to formally describe the elements in an Extensible Markup Language 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. [ 1 ]
In HTML and XML, a numeric character reference refers to a character by its Universal Coded Character Set/Unicode code point, and uses the format: &#xhhhh;. or &#nnnn; where the x must be lowercase in XML documents, hhhh is the code point in hexadecimal form, and nnnn is the code point in decimal form.
The Atom Syndication Format is an XML language used for web feeds, while the Atom Publishing Protocol (AtomPub or APP) is a simple HTTP-based protocol for creating and updating web resources. [ 1 ] Web feeds allow software programs to check for updates published on a website.
In the common situation where a list of multiple values is desired, this must be done by encoding the list into a well-formed XML attribute [i] with some format beyond what XML defines itself. Usually this is either a comma or semi-colon delimited list or, if the individual values are known not to contain spaces, [ ii ] a space-delimited list ...
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.
OML: an XML format for outlines, based on OPML. Open eBook: the e-book format defined by Open eBook Publication Structure Specification; superseded by ePub. Open Scripture Information Standard (OSIS), an XML-markup schema that defines tags for marking up Bibles, theological commentaries, and other related literature.
Efficient XML Interchange (EXI) is a binary XML format for exchange of data on a computer network. It was developed by the W3C's Efficient Extensible Interchange Working Group and is one of the most prominent efforts to encode XML documents in a binary data format, rather than plain text. Using EXI format reduces the verbosity of XML documents ...