DTD Attribute Types - CDATA
As with all attribute types, the attribute type of CDATA is placed after the attribute name and before the default value.
Syntax:
<!ATTLIST element_name
attribute_name CDATA default_value>
Example:
<!ATTLIST mountain
country CDATA "New Zealand">
Valid XML - The following XML document would be valid, as it conforms to the above DTD:
<mountains>
<mountain country="New Zealand">
<name>Mount Cook</name>
</mountain>
<mountain country="Australia">
<name>Cradle Mountain</name>
</mountain>
</mountains>