# Document Type Declaration

> instruction that associates a particular SGML or XML document with a document type definition (DTD)

**Wikidata**: [Q5372118](https://www.wikidata.org/wiki/Q5372118)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Document_type_declaration)  
**Source**: https://4ort.xyz/entity/document-type-declaration