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# QXmlDTDHandlerInterface Class Reference
[com.trolltech.qt.xml module]

The `QXmlDTDHandler` class provides an interface to report DTD content of XML data. More...

Inherited by `QXmlDTDHandler`.

## Detailed Description

The `QXmlDTDHandler` class provides an interface to report DTD content of XML data.

If an application needs information about notations and unparsed entities, it can implement this interface and register an instance with QXmlReader::setDTDHandler().

Note that this interface includes only those DTD events that the XML recommendation requires processors to report, i.e. notation and unparsed entity declarations using `notationDecl` and `unparsedEntityDecl` respectively.

See also `QXmlDeclHandler`, `QXmlContentHandler`, `QXmlEntityResolver`, `QXmlErrorHandler`, `QXmlLexicalHandler`, and Introduction to SAX2.