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Information Technology Miscellaneous in Information Technology . 1 week ago
A document type definition (DTD) is a set of markup declarations that define a document type for an SGML-family markup language (GML, SGML, XML, HTML).
A DTD defines the valid building blocks of an XML document. It defines the document structure with a list of validated elements and attributes. A DTD can be declared inline inside an XML document, or as an external reference.
XML uses a subset of SGML DTD.
As of 2009, newer XML namespace-aware schema languages (such as W3C XML Schema and ISO RELAX NG) have largely superseded DTDs. A namespace-aware version of DTDs is being developed as Part 9 of ISO DSDL. DTDs persist in applications that need special publishing characters, such as the XML and HTML Character Entity References, which derive from larger sets defined as part of the ISO SGML standard effort.
Posted on 15 Dec 2024, this text provides information on Information Technology related to Miscellaneous in Information Technology. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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