[lxml-dev] Re: document('') stylesheet access in XSLT

Stefan Behnel wrote:

Paul Everitt wrote:

...

Before writing and checking in a test, I want to find out if something is known behavior. I have an XSLT that uses XML data in the stylesheet itself. Essentially:

---- xslt preamble stuff ---- <localstuff> <localitem>klkdk</localitem> </localstuff> .....later....

It works with xsltproc but doesn't work with lxml. I wonder if there's something about the resolver that is the issue.

Should I file a case for this, or is this known behavior?

Hmmm, I can reproduce that. This results in an empty root tag 'test':

--------------- from lxml import etree

xslt = etree.XSLT(etree.XML('''\ http://www.w3.org/1999/XSL/Transform">

<test> </test> '''))

print xslt(etree.XML('<a/>')), ---------------

Looks like libxslt doesn't know how to access document('') without an XSLT specific entity loader. You can run xsltproc with the '--load-trace' option to see that the entity solver handles that access, too. According to strace, it even reads in the file twice, so we'd either have to provide the XSLT processor with access to the original XSL file (which is impossible if it is generated in memory) or write a replacement to the entity resolver that handles that special case.

Ok, point made. :^) I'm currently working around this by putting the nodes I want into the input document. However, that makes me pay a penalty on every request, instead of just once when the stylesheet is generated. I can live with it, though. It's already lots faster than other templating approaches. :^) --Paul