Subject: [xsl] Copy-per-default From: Fredrik Bengtsson <Fredrik.Bengtsson@xxxxxxxxxxxx> Date: Wed, 20 Apr 2011 15:24:54 +0000 |
Hi, I am using FOP trunk to generate PDFs from DocBook documents on the command line. Fop.bat is doing the XSL transformation, using whatever engine fop uses (xalan?). I have written the XSLT entirely by myself, i.e. I am not using any default DocBook transform or similar. The transform is small and under my strict control. I am having the problem that the transform does not behave as expected in two ways: * Contents of nodes are being copied to the output as if there were some kind of identity transform in effect by default even though I have not written one, and * Matches far down in the document cannot fetch data that existed earlier in the document, as if select="/x" selected the x post-transform instead of pre-transform Imagine a document like this (ignoring namespaces etc for brevity): <book> <titleabbrev>THEDOC</titleabbrev> <chapter> <title>Ch. 2: The chapter</title> <titleabbrev>Ch. 2</titleabbrev> </chapter> </book> If I have the following transforms in place: <xsl:template match="/d:book"> <!-- ignoring root, page-sequence etc for brevity --> <xsl:apply-templates /> </xsl:template> <xsl:template match="d:chapter"> <xsl:apply-templates /> </xsl:template> <xsl:template match="d:chapter/d:title"> <fo:block> ... ... </fo:block> </xsl:template> Then for some reason the titleabbrev appears in the output even though I have not made any rule explicitly matching it. It is caught along with the title inside the apply-templates under d:chapter. I thought that this would not happen, unless I really added a matching template of some sort, for example an identity transform. I then just for fun tried to add the following template: <xsl:template match="*" /> That got rid of the offending titleabbrev, BUT it also had the effect of breaking another template that special-cases the first chapter: <xsl:template match="d:chapter[1]"> <xsl:variable name="abbr"> <xsl:value-of select="/d:book/d:titleabbrev" /> </xsl:variable> <!-- note: that selects a node that is higher up in the document --> <!-- now do something with $abbr --> </xsl:template> It seems that at that point, book/titleabbrev has already been transformed, i.e. removed due to the catch-all template above, so $abbr is empty. That strikes me as extremely strange; should the select not grab nodes from the original unmodified document? If I remove the catch-all, $abbr is set properly just as expected. This is really confusing! And again - I am not using a huge third-party transform and modifying it, but rather using a really small, custom-written and strict one under my control. /Fredrik
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