XDV does not seem to compile "descendant" axis

[Jim Leek]

Found that XDV does not seem to compile "descendant" axis.

In order to remove images from the Plone menu portlet in my rules.xml I added:

    <drop content='//li[@class="navTreeItem"]/descendant::img' />

This produced the following in debug mode:

2011-01-07 12:37:09 ERROR plone.transformchain Unexpected error whilst trying to apply transform chain
Traceback (most recent call last):
  File "/usr/local/Plone/buildout-cache/eggs/plone.transformchain-1.0b1-py2.4.egg/plone/transformchain/transformer.py", line 42, in __call__
    newResult = handler.transformIterable(result, encoding)
  File "/usr/local/Plone/buildout-cache/eggs/collective.xdv-1.0rc11-py2.4.egg/collective/xdv/transform.py", line 281, in transformIterable
    transform = self.setupTransform()
  File "/usr/local/Plone/buildout-cache/eggs/collective.xdv-1.0rc11-py2.4.egg/collective/xdv/transform.py", line 245, in setupTransform
    transform = etree.XSLT(compiled_theme, access_control=access_control)
  File "xslt.pxi", line 399, in lxml.etree.XSLT.__init__ (src/lxml/lxml.etree.c:107912)
XSLTParseError: xsltCompilePattern : failed to compile '//li[@class="navTreeItem"]/descendant::img'

Conversley the child axis compiles fine:

    <drop content='//li[@class="navTreeItem"]/child::img' />

[Laurence Rowe (lrowe)]

This needs better documentation.

<drop theme="..."/> compiles to an <xsl:template match="...">. This restricts it to a location path selector, see https://bugs.launchpad.net/xdv/+bug/657968 for the full details.

Laurence