Question

what is DTD in computer

Answer 1

A Document Type Definition (DTD) is a specific document defining and constraining definition or set of statements that follow the rules of the Standard Generalized Markup Language (SGML) or of the Extensible Markup Language (XML), a subset of SGML.

Answer 2

${\huge{\mathbb{\green{ANSWER}}}}$

${\mathtt{\blue{\underline{\pink{DTD: Document Type Definition}}}}}$