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[xsl] Specifying an element from a separate XML file

2009-05-20 18:55:44
Is it possible to specify an element in one “input” XML file from a
value in a second “configuration” XML file using XSLT?

For example I have an "input.xml" file with the desired data.
-------------------------------------
<catalog>
  <cd>
    <title>Empire Burlesque(_at_)the nightmare</title>
    <artist>Bob Dylan</artist>
    <country>USA</country>
    <company>Columbia</company>
    <price>10.90</price>
    <year>1985</year>
  </cd>
  <cd>
    <title>Hide your heart</title>
    <artist>Bonnie Tyler</artist>
    <country>UK</country>
    <company>CBS Records</company>
    <price>9.90</price>
    <year>1988</year>
  </cd>
</catalog>
--------------------------------------

And a "configuration.xml" file that states which elements I require.
In this case I wish to output only the title and artist elements and
ignore the country, company and other elements.
--------------------------------------
<configuration>
  <column>title</column>
  <column>artist</column>
</configuration>
--------------------------------------

The XSLT would be something like:
--------------------------------------
<?xml version="1.0"?>

<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>

<xsl:template match="/">
  <html>
  <body>
    <h2>My CD Collection</h2>
    <table border="1">
      <xsl:for-each select="catalog/cd">
        <tr>
          <td><xsl:value-of select="title"/></td>
          <td><xsl:value-of select="artist"/></td>
        </tr>
      </xsl:for-each>
    </table>
  </body>
  </html>
</xsl:template>

</xsl:stylesheet>
--------------------------------------

EXCEPT that the <xsl:value-of select="title"/> and <xsl:value-of
select="artist"/> entries would be replaced by the value of each
configuration/column element in configuration.xml file.

My goal is to provide an external configuration file for the
transformation so that the XSLT can be reused without editing.

I'm using Saxon-B 9.1

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