Definitions for "Document Type Definition"
Keywords:  dtd, sgml, xml, schema, markup
Defines what content can exist in an XML document. DTDs are part of the W3C XML Specification 1.0.
DTD states what tags and attributes are used to describe content in an SGML document, where each tag is allowed, and which tags can appear within other tags.
A specific definition that accompanies a document and identifies how each markup (or tag) will be processed (also see markup, tag). Used in XML.
Keywords:  mark, language, specification
A specification for a mark-up language.