- Qt 6.6
- XML Processing
- Qt 6.6.2 Reference Documentation

# XML Processing

Qt provides two sets of APIs to read and write well-formed XML: stream based and DOM based.

Qt also provides specific support for some XML dialects. The Qt SVG module provides the QSvgRenderer and QSvgGenerator classes to read and write a subset of SVG, an XML-based file format. Qt also provides helper functions that may be useful to those working with XML and XHTML: see Qt::escape() and Qt::convertFromPlainText().

## Topics:

- Classes for XML Processing
- An Introduction to Namespaces
- XML Streaming
- Working with the DOM Tree

## Classes for XML Processing

These classes are relevant to XML users.

QDomAttr | Represents one attribute of a QDomElement
QDomCDATASection | Represents an XML CDATA section
QDomCharacterData | Represents a generic string in the DOM
QDomComment | Represents an XML comment
QDomDocument | Represents an XML document
QDomDocument::ParseResult | Struct is used to store the result of QDomDocument::setContent()
QDomDocumentFragment | Tree of QDomNodes which is not usually a complete QDomDocument
QDomDocumentType | The representation of the DTD in the document tree
QDomElement | Represents one element in the DOM tree
QDomEntity | Represents an XML entity
QDomEntityReference | Represents an XML entity reference
QDomImplementation | Information about the features of the DOM implementation
QDomNamedNodeMap | Contains a collection of nodes that can be accessed by name
QDomNode | The base class for all the nodes in a DOM tree
QDomNodeList | List of QDomNode objects
QDomNotation | Represents an XML notation
QDomProcessingInstruction | Represents an XML processing instruction
QDomText | Represents text data in the parsed XML document
QXmlAttributes | XML attributes
QXmlContentHandler | Interface to report the logical content of XML data
QXmlDTDHandler | Interface to report DTD content of XML data
QXmlDeclHandler | Interface to report declaration content of XML data
QXmlDefaultHandler | Default implementation of all the XML handler classes
QXmlEntityResolver | Interface to resolve external entities contained in XML data
QXmlErrorHandler | Interface to report errors in XML data
QXmlInputSource | The input data for the QXmlReader subclasses
QXmlLexicalHandler | Interface to report the lexical content of XML data
QXmlLocator | The XML handler classes with information about the parsing position within a file
QXmlNamespaceSupport | Helper class for XML readers which want to include namespace support
QXmlParseException | Used to report errors with the QXmlErrorHandler interface
QXmlReader | Interface for XML readers (i.e. parsers)
QXmlSimpleReader | Implementation of a simple XML parser
QXmlStreamAttribute | Represents a single XML attribute
QXmlStreamAttributes | Represents a vector of QXmlStreamAttribute
QXmlStreamEntityDeclaration | Represents a DTD entity declaration
QXmlStreamEntityResolver | Entity resolver for a QXmlStreamReader
QXmlStreamNamespaceDeclaration | Represents a namespace declaration
QXmlStreamNotationDeclaration | Represents a DTD notation declaration
QXmlStreamReader | Fast parser for reading well-formed XML via a simple streaming API
QXmlStreamWriter | XML writer with a simple streaming API