SGML

File Format
Name	SGML
Ontology	Electronic File Formats Markup SGML
Extension(s)	.sgml
MIME Type(s)	application/sgml, text/sgml
PRONOM	x-fmt/195

SGML (Standard Generalized Markup Language) is a general format for markup languages descended from a 1960s IBM effort ("Generalized Markup Language"). It uses Document Type Definitions (DTDs) to define the specifics of a particular markup format. HTML was originally developed as a version of SGML, but has drifted away from this and the current HTML 5 is explicitly no longer based on SGML. XML is a somewhat simplified variant of SGML.

See also

• DSSSL
• DTD
• HTML
• XML

Specifications

• ISO 8879

Sample files

• dexvert samples — text/sgml

External links

• Wikipedia article
• W3C Overview of SGML Resources
• SGML Syntax Summary Index