bugGNU gettext - Bugs: bug #54472, appdata.xml string extraction...

 
 

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bug #54472: appdata.xml string extraction broken when root component has namespace

Submitter:  Claude Paroz <claudep>
Submitted:  Wed 08 Aug 2018 09:09:12 PM UTC
 
Category:  AppData Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open

Wed 31 Jul 2019 05:24:52 AM UTC, comment #3: 

This sounds like a general question about XPath, not a deficiency in gettext itself.

If the upstream schema mandates a namespace, all the conforming data files should have an explicit xmlns.

If namespace is optional like metainfo, you can prepare the ITS rules to match against local names only:
https://stackoverflow.com/questions/5239685/xml-namespace-breaking-my-xpath

Daiki Ueno <ueno>
Project Administrator
Mon 29 Jul 2019 09:04:51 PM UTC, comment #2: 

We have the same issue in Inkscape, where we want to extract translatable strings from the simple XML format that is used to describe the GUI-parts of Inkscape extensions (*.inx file format).

They use the XML namespace "http://www.inkscape.org/namespace/inkscape/extension" and look like the following:

<?xml version="1.0" encoding="UTF-8"?>
<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
...
</inkscape-extension>

It's obviously neither a metainfo nor an appdata file format, but I had hoped xgettext would aim to support ITS rules in a more general way?

Patrick Storz <ede123>
Wed 08 Aug 2018 09:43:25 PM UTC, comment #1: 

The specification of the metainfo and appdata file format, https://www.freedesktop.org/software/appstream/docs/chap-Metadata.html#sect-Metadata-GenericComponent, says:

"The XML in metainfo files does not need any XML namespace, and adding one should generally be avoided. If you want to use a namespace though (maybe in case you want to embed the data in other contexts), the xmlns should be https://specifications.freedesktop.org/metainfo/1.0."

So, it should use https://specifications.freedesktop.org/metainfo/1.0 as the default namespace.

Bruno Haible <haible>
Project Administrator
Wed 08 Aug 2018 09:09:12 PM UTC, original submission:  

Simply change gettext/gettext-tools/tests/xgettext-appdata-1:
-<component type="desktop">
+<component type="desktop" xmlns="https://specifications.freedesktop.org/metainfo/1.0">

and you'll see that ITS rules will no longer apply to string extraction (ie. all strings are extracted instead of a selection).

This was discovered in https://gitlab.gnome.org/GNOME/gucharmap/issues/11

Claude Paroz <claudep>

 

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