Project news

Invitation to comment on The DocBook Schema v5.1.1

First review of this draft specification - ends August 29th

OASIS and the OASIS DocBook TC are pleased to announce that The DocBook Schema Version 5.1.1 is now available for public review and comment.

Schematron tools do not work with DocBook 5.1. This DocBook 5.1.1 specification is updated with the new Schematron rules so users can continue using DocBook 5.1 if they need to use newer Schematron tools.

The documents and related files are available here:

The DocBook Schema Version 5.1.1
Committee Specification Draft 01
09 June 2021

Editable source (Authoritative):



Relax NG schemas:
Schematron schema:

For your convenience, OASIS provides a complete package of the specification document and any related files in ZIP distribution files. You can download the ZIP file at:

How to Provide Feedback

OASIS and the OASIS DocBook TC value your feedback. We solicit input from developers, users and others, whether OASIS members or not, for the sake of improving the interoperability and quality of its technical work.

The public review starts 31 July 2021 at 00:00 UTC and ends 29 August 2021 at 23:59 UTC.

Comments may be submitted to the TC by any person through the use of the OASIS TC Comment Facility which can be used by following the instructions on the TC’s “Send A Comment” page (

Comments submitted by TC non-members for this work and for other work of this TC are publicly archived and can be viewed at:

All comments submitted to OASIS are subject to the OASIS Feedback License, which ensures that the feedback you provide carries the same obligations at least as the obligations of the TC members. In connection with this public review, we call your attention to the OASIS IPR Policy [1] applicable especially [2] to the work of this technical committee. All members of the TC should be familiar with this document, which may create obligations regarding the disclosure and availability of a member’s patent, copyright, trademark and license rights that read on an approved OASIS specification.

OASIS invites any persons who know of any such claims to disclose these if they may be essential to the implementation of the above specification, so that notice of them may be posted to the notice page for this TC’s work.

Additional information about this review and any previous public reviews is published with the specification documents at:

Additional information about the specification and the DocBook TC can be found at the TC’s public home page:

Additional references


RF on Limited Terms Mode