<?xml version="1.0" encoding="UTF-8"?>
<Catalog>
  <cds>
    <cd>
      <number>000001</number>
      <title>Empire Burlesque</title>
    </cd>
    <cd>
      <number>000002</number>
      <title>Hide Your Heart</title>
    </cd>
  </cds>
  <artists>
    <artist>
      <number>000001</number>
      <name>Bob Dylan</name>
    </artist>
    <artist>
      <number>000002</number>
      <name>Bonnie Tyler</name>
    </artist>
  </artists>
 </Catalog>

<xsl:template match="Catalog">
  <xsl:copy>
    <xsl:for-each-group select="cds/cd | artists/artist" group-by="number">
      <cd>
        <xsl:apply-templates select="current-group()/(title, name)"/>
      </cd>
    </xsl:for-each-group>
  </xsl:copy>
</xsl:template>

<xsl:template match="title">
  <xsl:copy-of select="."/>
</xsl:template>

<xsl:template match="artist/name">
  <artist>
    <xsl:apply-templates/>
  </artist>
</xsl:template>

Cheers,
Wendell

Is there an easy way for an XSL rookie to transform it to look more like this?

<?xml version="1.0" encoding="UTF-8"?>
 <Catalog>
   <cd>
     <title>Empire Burlesque</title>
     <artist>Bob Dylan</artist>
    </cd>
    <cd>
      <title>Hide Your Heart</title>
    <artist>Bonnie Tyler></artist>
  </cd>
</Catalog>

======================================================================
Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
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  Mulberry Technologies: A Consultancy Specializing in SGML and XML
======================================================================