Map an IDREF attribute node to the element it refers to
Composers and their compositions are linked through the
an ID-type
id attribute of the composer element
and the IDREF-type composer attribute of the
composition element:
<composer id="c3">
<name>
<first_name>Beth</first_name>
<middle_name></middle_name>
<last_name>Anderson</last_name>
</name>
</composer>
<composition composers="c3">
<title>Trio: Dream in D</title>
<date><year>(1980)</year></date>
<length>10'</length>
<instruments>fl, pn, vc, or vn, pn, vc</instruments>
<description>
Rhapsodic. Passionate. Available on CD
<cite><a href="http://www.amazon.com/exec/obidos/ASIN/B000007NMH/qid%3D913265342/sr%3D1-2/">Two by Three</a></cite>
from North/South Consonance (1998).
</description>
<publisher></publisher>
</composition>
With XPath 1.0:
<xsl:template match="composition">
<h2>
<xsl:value-of select="name"/> by
<xsl:value-of select="../composer[@id=current()/@composer]"/>
</h2>
</xsl:template>With XPath 2.0:
<xsl:template match="composition">
<h2>
<xsl:value-of select="name"/> by
<xsl:value-of select="@composers=>composer/name"/>
</h2>
</xsl:template>