DocBook Version 5.1
DocBook is a general purpose [XML] schema particularly well suited to books and papers about computer hardware and software (though it is by no means limited to these applications).
The Version 5.1 release introduces assemblies for topic-oriented authoring. It also addresses a selection of bugs and feature requests.
The Technical Committee provides the DocBook 5.1 schema in other schema languages, including W3C XML Schema and an XML DTD, but the RELAX NG Schema is the normative schema.
Produced by:OASIS DocBook TC
[DocBook-5.1] DocBook Version 5.1. Edited by Norman Walsh. 22 November 2016. OASIS Standard. http://docs.oasis-open.org/docbook/docbook/v5.1/os/docbook-v5.1-os.html. Latest version: http://docs.oasis-open.org/docbook/docbook/v5.1/docbook-v5.1.html.