Documents with embedded stylesheets may fail to transform with libxslt when they reference namespaces from their surrounding scope (attached, moop_0.xml). That example is a particularly tricky case as the stylesheet relies on a qname-in-content, but more straightforward examples involving literal result elements also fail currently. With a slight modification, making a copy the root element namespace declaration on its child (attached, moop_1.xml), the transformation succeeds. However, this demonstrates another issue, as the stylesheet is removed rather than copied from the source document. Saxon 6.5.5 produces the same result for both documents (attached, moop_expected_output.xml). I think libxslt should operate similarly, rather than keeping its current behaviour (attached, xsltproc_output.txt). This is a corner case seems rather underspecified, but see: <http://www.w3.org/TR/xslt#section-Embedding-Stylesheets> The example given doesn't address the namespace/qname issue closely, but does imply that the internal stylesheet should be part of the input document, rather than being removed from it. I have suggested a few possible changes (attached, libxslt_internal_transform.patch) but it needs someone who gets the implications to pick an option. It seems that the xmlDOMWrap* family of functions are an (incomplete?) attempt to address this category of namespace issues, and could potentially solve the whole problem, whereas the first two suggestions would not fix the inital document above. Martin
<!DOCTYPE xmp:moop [<!ATTLIST xsl:transform id ID #IMPLIED>]> <?xml-stylesheet type="text/xsl" href="#transform"?> <xmp:moop xmlns:xmp="http://example.com/ns"; xmlns:xsl="http://www.w3.org/1999/XSL/Transform";> <xsl:transform id="transform" version="1.0"> <xsl:template match="/xmp:moop"> <xsl:copy-of select="."/> </xsl:template> </xsl:transform> </xmp:moop>
<!DOCTYPE xmp:moop [<!ATTLIST xsl:transform id ID #IMPLIED>]> <?xml-stylesheet type="text/xsl" href="#transform"?> <xmp:moop xmlns:xmp="http://example.com/ns"; xmlns:xsl="http://www.w3.org/1999/XSL/Transform";> <xsl:transform id="transform" version="1.0" xmlns:xmp="http://example.com/ns";> <xsl:template match="/xmp:moop"> <xsl:copy-of select="."/> </xsl:template> </xsl:transform> </xmp:moop>
<?xml version="1.0" encoding="utf-8"?><xmp:moop xmlns:xmp="http://example.com/ns"; xmlns:xsl="http://www.w3.org/1999/XSL/Transform";> <xsl:transform id="transform" version="1.0"> <xsl:template match="/xmp:moop"> <xsl:copy-of select="."/> </xsl:template> </xsl:transform> </xmp:moop>
$ xsltproc -V Using libxml 20632, libxslt 10124 and libexslt 813 xsltproc was compiled against libxml 20632, libxslt 10124 and libexslt 813 libxslt 10124 was compiled against libxml 20632 libexslt 813 was compiled against libxml 20632 $ xsltproc -v /moop_0.xml xsltLoadStylesheetPI : found PI href=#transform xsltLoadStylesheetPI : Reference to ID #transform reusing dictionary from moop_0.xml for stylesheet creating dictionary for stylesheet reusing dictionary from (null) for stylesheet xsltParseStylesheetProcess : found stylesheet xsltPrecomputeStylesheet: removing ignorable blank node xsltCompilePattern : parsing '/xmp:moop' error xsltCompileStepPattern : no namespace bound to prefix xmp compilation error: element template xsltCompilePattern : failed to compile '/xmp:moop' parsed 1 templates freeing dictionary from stylesheet creating dictionary for stylesheet reusing dictionary from moop_0.xml for stylesheet xsltPrecomputeStylesheet: removing ignorable blank node compilation error: file moop_0.xml line 3 element moop xsltParseStylesheetProcess : document is not a stylesheet freeing dictionary from stylesheet $ xsltproc -v /moop_1.xml xsltLoadStylesheetPI : found PI href=#transform xsltLoadStylesheetPI : Reference to ID #transform reusing dictionary from moop_1.xml for stylesheet creating dictionary for stylesheet reusing dictionary from (null) for stylesheet xsltParseStylesheetProcess : found stylesheet xsltPrecomputeStylesheet: removing ignorable blank node template has 1 inherited namespaces xsltCompilePattern : parsing '/xmp:moop' xsltCompilePattern : parsed /xmp:moop, default priority 0.500000 added pattern : '/xmp:moop' priority 0.500000 parsed 1 templates Resolving attribute sets references Creating sub-dictionary from stylesheet for transformation Registered 0 modules reusing transformation dict for output Registering global variables xsltProcessOneNode: no template found for / xsltProcessOneNode: applying template '/xmp:moop' for moop xsltCopyOf: select . xsltCopyOf: result is a node set xsltCopyTextString: copy text xsltCopyTextString: copy text freeing transformation dictionary <?xml version="1.0"?> <xmp:moop xmlns:xmp="http://example.com/ns"; xmlns:xsl="http://www.w3.org/1999/XSL/Transform";> </xmp:moop> freeing dictionary from stylesheet
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libxslt_embedded_stylesheet.patch
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