Date: prev next · Thread: first prev next last
2018 Archives by date, by thread · List index



hi all,

the result of a TDF-sponsored project have landed on master now: we have an ODF schema that contains LibreOffice extensions, and this is used in all unit tests if --with-export-validation is given, which is the default.

notably this means that if you add a new feature to the ODF filters and you add the required unit test for the new feature, then most likely the test will fail with a complaint from the validator; in this case the schema needs to be updated to contain the new elements and attributes.

the schema files are in core.git in the schema/libreoffice directory.

the extension schema uses the RelaxNG "include" feature to refer to the ODF schema; this means that it only contains those parts of the schema that actually need to be changed - this works well in many cases because the ODF schema is quite well structured with many named patterns, but unfortunately there are a few places where that isn't the case and large chunks needed to be copied to override them.

in the easy case, to add an attribute you just want to search for the corresponding element, which will have a "foo-attlist" named pattern, and then add another attribute like this:

  <rng:define name="draw-enhanced-geometry-attlist" combine="interleave">
    <rng:optional>
      <rng:attribute name="drawooo:sub-view-size">
        <rng:ref name="string"/>
      </rng:attribute>
    </rng:optional>
  </rng:define>

currently only the features that are actually exported in the unit tests have been added to the schema; there is still some work to do here to add everything; the crashtesting script also does ODF validation of all files and now also uses the custom schema, so those results will be interesting...

during this work we found a couple bugs where the schema and the export filter didn't agree; this led to updating at least one not-yet-accepted proposal at OASIS, and 2 bug fixes in LO code.

unfortunately it turned out that there are a lot of extensions already for which no proposal exists, and in many cases not even an entry on the Wiki [2], so clearly something like this extension schema is needed :)

[1] git grep TODO schema/libreoffice
[2] https://wiki.documentfoundation.org/Development/ODF_Implementer_Notes/List_of_LibreOffice_ODF_Extensions

Context


Privacy Policy | Impressum (Legal Info) | Copyright information: Unless otherwise specified, all text and images on this website are licensed under the Creative Commons Attribution-Share Alike 3.0 License. This does not include the source code of LibreOffice, which is licensed under the Mozilla Public License (MPLv2). "LibreOffice" and "The Document Foundation" are registered trademarks of their corresponding registered owners or are in actual use as trademarks in one or more countries. Their respective logos and icons are also subject to international copyright laws. Use thereof is explained in our trademark policy.