Where can qualified names appear?

XML Interview Questions and Answers

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109. Where can qualified names appear?

Qualified names can appear anywhere an element type or attribute name can appear: in start and end tags, as the document element type, and in element type and attribute declarations in the DTD. For example:

<!DOCTYPE foo:A [
<!ELEMENT foo:A (foo:B)>
<!ATTLIST foo:A
foo:C CDATA #IMPLIED>
<!ELEMENT foo:B (#PCDATA)>
]>
<foo:A xmlns:foo="http://www.foo.org/" foo:C="bar">
<foo:B>abcd
<foo:A>

Qualified names cannot appear as entity names, notation names, or processing instruction targets.

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