SGML

Hypertext Markup Language (HTML) is the standard markup language for documents designed to be displayed in a web browser. It defines the content and structure of web content. It is often assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript.

Extensible Markup Language (XML) is a markup language and file format for storing, transmitting, and reconstructing data. It defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. The World Wide Web Consortium's XML 1.0 Specification of 1998 and several other related specifications—all of them free open standards—define XML.

markup language

set of markup declarations that define a document type for an SGML-family markup language

DocBook is a semantic markup language for technical documentation. It was originally intended for writing technical documents related to computer hardware and software, but it can be used for any other sort of documentation.

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

computer language for specifying stylesheets for SGML documents

primitive data type, which associates a string with either a unique alias (such as a user-specified name) or an SGML reserved word

a government term that refers to the digitalization of paper-based documents and bidding processes

the father of SGML and grandfather of HTML and the World Wide Web