.. SPDX-FileCopyrightText: © 2026 BBC
..
.. SPDX-License-Identifier: BSD-3-Clause

.. ttml-validator documentation master file

Welcome to ttml-validator's documentation!
==========================================

ttml-validator is a Python project for validating TTML_ files.
It currently validates two profiles, EBU-TT-D_ and `IMSC Text`_
conforming to the `BBC Subtitle Guidelines`_, and DAPT_.

Contents:

.. toctree::
   :maxdepth: 2

   usage
   testing
   internals
   dependencies
   preParseChecks
   xmlChecks
   validationLogging
   development
   source/modules/src


Indices and tables
==================

* :ref:`genindex`
* :ref:`modindex`
* :ref:`search`

.. _TTML: https://www.w3.org/TR/ttml2/
.. _EBU-TT-D: https://tech.ebu.ch/publications/tech3380
.. _IMSC Text: https://www.w3.org/TR/ttml-imsc1.3/
.. _BBC Subtitle Guidelines: https://www.bbc.co.uk/accessibility/forproducts/guides/subtitles/
.. _DAPT: https://www.w3.org/TR/dapt/