Standard Generalized Markup Language
The Standard Generalized Markup Language (SGML; ISO 8879:1986) is a standard for defining generalized markup languages for documents. ISO 8879 Annex A.1 states that generalized markup is "based on two postulates":
- Declarative: Markup should describe a document's structure and other attributes rather than specify the processing that needs to be performed, because it is less likely to conflict with future developments.
- Rigorous: In order to allow markup to take advantage of the techniques available for processing, markup should rigorously define objects like programs and databases.
| Filename extension |
.sgml |
|---|---|
| Internet media type |
application/sgml, text/sgml |
| Uniform Type Identifier (UTI) | public.xml |
| Developed by | ISO |
| Type of format | Markup language |
| Extended from | GML |
| Extended to | HTML, XML |
| Standard | ISO 8879 |
DocBook SGML and LinuxDoc are examples which used SGML tools.
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