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Document type definition (DTD)
An optional part of the XML document prolog, as specified by the XML standard. The DTD specifies constraints on the valid tags and tag sequences that can be in the document. The DTD has a number of shortcomings, however, and this has led to various schema proposals. For example, the DTD entry <!ELEMENT username (#PCDATA)> says that the XML element called username contains parsed character data-that is, text alone, with no other structural elements under it. The DTD includes both the local subset, defined in the current file, and the external subset, which consists of the definitions contained in external DTD files that are referenced in the local subset using a parameter entity.
- Part of Speech: noun
- Synonym(s):
- Blossary:
- Industry/Domain: Computer
- Category: Workstations
- Company: Sun
- Product:
- Acronym-Abbreviation:
Other Languages:
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