CDATA Definition
<?xml version="1.0"?>
<!DOCTYPE body [
<!ELEMENT body (#PCDATA)>
]>
<body>
<![CDATA[
<!DOCTYPE klasse [
<!ELEMENT klasse (name)*>
<!ELEMENT name (#PCDATA)>
<!ATTLIST name nummer ID #REQUIRED>
<!ATTLIST name lehrer IDREF #IMPLIED>
]>
]]>
</body>
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