The composers and their compositions are linked through the
the id attribute of the composer element
and the 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 composer="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=913265342/sr%3D1-2/">
Two by Three</a></cite> from North/South Consonance (1998).
</description>
<publisher></publisher>
</composition>