[xml] Relative paths in XPointer

[Manuel González Castro <iinmgc00 ucv udc es>]

Hi,

The "XPointer xpointer() Scheme Working Draft" (http://www.w3.org/TR/xptr-xpointer/) says that the function 
"here()" can be used to point locations using relative paths. I'm trying to get it working with xmllint, but 
I'm getting errors whenever I use XInclude with XPointer relative paths.

I haven't seen any bug related to this error, and I think my xpointer expressions are correct.

So, does libxml support "here()" and other relative-path functions like "parent::*" inside xpointer 
expressions?

I'm using xmllint built on W2K from today CVS, and here are the testcases:

---------------------------------------------------------------------
This example with an xpointer absolte path works great:

D:\tests>type xpointer_absolute.xml

<a>
  <b id="1"/>
  <b id="2"/>
  <c>
    <xi:include xpointer="xpointer(/a/b[ id='1'])" xmlns:xi="http://www.w3.org/2003/XInclude"/>
  </c>
</a>

D:\tests>xmllint --xinclude xpointer_absolute.xml

<?xml version="1.0"?>
<a>
  <b id="1"/>
  <b id="2"/>
  <c>
    <b id="1"/>
  </c>
</a>

---------------------------------------------------------------------
And this is the same with an xpointer relative path:

D:\tests>type xpointer_relative.xml

<a>
  <b id="1"/>
  <b id="2"/>
  <c>
    <xi:include xpointer="xpointer(here()/parent::*/parent::*/b[ id='1'])" 
xmlns:xi="http://www.w3.org/2003/XInclude"/>
  </c>
</a>

D:\tests>xmllint --xinclude xpointer_relative.xml
XPath error : Invalid type
xpointer_relative.xml:5: element include: XInclude error : XPointer evaluation failed: 
#xpointer(here()/parent::*/parent::*/b[ id='1'])
xpointer_relative.xml:5: element include: XInclude error : could not load xpointer_relative.xml, and no 
fallback was found
<?xml version="1.0"?>
<a>
  <b id="1"/>
  <b id="2"/>
  <c>
    <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"; xpointer="xpointer(here()/parent::*/parent::*/b[ 
id='1'])"/>
  </c>
</a>
---------------------------------------------------------------------

Any hint?

Thanks,
Manuel