DTD - Grammar language

DTD, aka document type definition, is a grammar language created in 1996.

#585on PLDB

28Years Old

A document type definition (DTD) is a set of markup declarations that define a document type for an SGML-family markup language (SGML, XML, HTML). A Document Type Definition (DTD) defines the legal building blocks of an XML document. It defines the document structure with a list of legal elements and attributes. Read more on Wikipedia...

Tags: grammarLanguage
Early development of DTD happened in ISO
Pygments supports syntax highlighting for DTD
See also: (2 related languages) XML, HTML
22 PLDB concepts link to DTD: Ballerina, Ceylon, Click, commonmark, Eiffel, Emscripten, Erlang, Factor, Gradle, HHVM, Java, mythryl, NetLogo, OpenNN, PHP, Pygments, Python, relax, SmallBASIC, Trex, VLC, xduce

Example from Wikipedia:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!DOCTYPE people_list [
  <!ELEMENT people_list (person*)>
  <!ELEMENT person (name, birthdate?, gender?, socialsecuritynumber?)>
  <!ELEMENT name (#PCDATA)>
  <!ELEMENT birthdate (#PCDATA)>
  <!ELEMENT gender (#PCDATA)>
  <!ELEMENT socialsecuritynumber (#PCDATA)>
]>
<people_list>
  <person>
    <name>Fred Bloggs</name>
    <birthdate>2008-11-27</birthdate>
    <gender>Male</gender>
  </person>
</people_list>