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    <p>Lxml uses the catalog support from <a href="http://xmlsoft.org/catalog.html" rel="nofollow">libxml2</a>. Use the environment variable <code>XML_CATALOG_FILES</code> to provide a list of catalogs (you could set this from python as well, using <a href="http://docs.python.org/library/os.html#os.environ" rel="nofollow">os.environ</a>), or, if this variable is not present, it checks for the existence of <code>/etc/xml/catalog</code> (can't use this one on windows of course).</p> <p>An alternative would be to use a custom URI resolver. You can find more information in the <a href="http://lxml.de/resolvers.html" rel="nofollow">lxml docs</a></p> <p>EDIT: apparently, the question was not about the actual xinclude processing, which works, but about a way to "query" the catalog, or ask it for the actual filenames that would be used for the inclusions.</p> <p>Lxml (at least currently) has no API to do that. The underlying libxml2 library does support this, however, and the "original" <a href="http://xmlsoft.org/python.html" rel="nofollow">libxml2 python bindings</a> allow you to do this (easy documentation is lacking though, the docstrings in the source code of the libxml2 help, however). So, although this module is not nearly as nice to use than lxml, it seems to be your best bet. Example which seems to work:</p> <pre><code>&gt;&gt;&gt; import libxml2 &gt;&gt;&gt; libxml2.loadCatalog('catalog.xml') &gt;&gt;&gt; print libxml2.catalogResolveURI('file:///common/logo.xml') file:///home/kst/svn/TOOLS/Docbook/common/logo.xml </code></pre>
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    1. POPython LXML catalog lookup
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    1. USSteven
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    1. COI've been trying to do this but I haven't been able to get it to work. Note that I am not interested in validating my document but in getting the filenames of any xml files the document includes and therefore depends on.
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      1. USKevin Steffensen
    2. COAs far as I know, it does not only apply to validating, but also to xinclude resolving. How dit you try it? Did you get any specific errors?
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      1. USSteven
    3. CO@Kevin Steffensen: I just tested a simple example myself, and xinclude with a catalog seems to work just fine? It would seem that there is something wrong with either the file location, or your xpointer (which would need an id attribute with the value of "logo", I used `xml:id="logo"` in my test. You could maybe try without the xpointer to check whether you can include the whole document first, then go on with the xpointer)
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