Partial example of the XML source file used.
<?xml version="1.0" ?>
<?xml-stylesheet type="text/xsl" href="amazon.xsl" ?>
<!DOCTYPE amazon SYSTEM "amazon.dtd">
<amazon>
<subjects>
<subject value="BYRON" fullname="George Gordon, Lord Byron">
<item type="book" asin="0312051247">
<title>The Love Poems of Lord Byron : A Romantic\'s Passion</title>
<image width="34" height="50"/>
<comments>An illustrated collection of 43 love poems which has received favorable reviews.</comments>
</item>
<item type="audio" asin="1565113004">
<title>Lord Byron Poems</title>
<image width="31" height="50"/>
<comments>Includes a commentary with historical and biographical context for each poem.</comments>
</item>
</subject>
<subject value="DICKINSON" fullname="Emily Dickinson">
<item type="book" asin="0674250702">
<title>Emily Dickinson : Selected Letters</title>
<image width="32" height="50"/>
<comments>Dickinson's own letters reveal the woman behind the writer.</comments>
</item>
</subject>
</subjects>
</amazon>
Part of the DTD (Document Type Definition) for this XML file:
<!ELEMENT amazon (subjects, icons)>
<!ELEMENT subjects (subject+)>
<!ELEMENT subject (item+)>
<!ATTLIST subject
value CDATA #REQUIRED
fullname CDATA #REQUIRED
>
<!ELEMENT item (title, image?, comments?)>
<!ATTLIST item
type (book|cd|video|audio) "book"
asin CDATA #REQUIRED
>
<!ELEMENT title (#PCDATA)>
<!ELEMENT image EMPTY>
<!ATTLIST image
url CDATA #IMPLIED
link CDATA #IMPLIED
width CDATA #IMPLIED
height CDATA #IMPLIED
border CDATA "0"
text CDATA ""
align CDATA #IMPLIED
>
<!ELEMENT comments (#PCDATA)>
<!ELEMENT icons (icon)*>
<!ELEMENT icon EMPTY>
<!ATTLIST icon
name CDATA #REQUIRED
url CDATA #REQUIRED
link CDATA #IMPLIED
width CDATA #IMPLIED
height CDATA #IMPLIED
border CDATA "0"
text CDATA ""
align CDATA "left"
>