Create XSL from XSL

问题:

I am trying to dynamically generate an XSLT document from an XSLT stylesheet. In principle this works, of course, but I do not get the namespaces working. I want to have the generated XSLT elements to be prefixed with "xsl" prefix:

<xsl:stylesheet ...>

rather than

<stylesheet xmlns="http://www.w3.org/1999/XSL/Transform">

I played around with namespace="" of xsl:element and with xsl:namespace but I do not get it working (xslt2/saxon available)

Any hints?

回答1:

If you want to use XSLT to create XSLT code then using http://www.w3.org/TR/xslt20/#element-namespace-alias helps e.g.

<xsl:stylesheet
  version="2.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:fo="http://www.w3.org/1999/XSL/Format"
  xmlns:axsl="file://namespace.alias">

<xsl:namespace-alias stylesheet-prefix="axsl" result-prefix="xsl"/>

<xsl:template match="/">
  <axsl:stylesheet version="2.0">
    <xsl:apply-templates/>
  </axsl:stylesheet>
</xsl:template>

<xsl:template match="elements">
  <axsl:template match="/">
     <axsl:comment select="system-property('xsl:version')"/>
     <axsl:apply-templates/>
  </axsl:template>
</xsl:template>

<xsl:template match="block">
  <axsl:template match="{.}">
     <fo:block><axsl:apply-templates/></fo:block>
  </axsl:template>
</xsl:template>

</xsl:stylesheet>

回答2:

I found the solution:

<xsl:element name="xsl:stylesheet">
</xsl:element>

does the job! (i.e., avoid using namespace="" but explicitely list the namespace prefix)

回答3:

The xsl:namespace-alias instruction was designed having exactly this use case in mind -- just start using it in your work.

Here is a real-world example:

http://dnovatchev.wordpress.com/2006/10/21/a-stylesheet-to-write-xslt-code/