QtXml

QtXml is a module within the Qt framework that provides classes for parsing and manipulating XML documents. It allows developers to read, write, and modify XML data in a structured and efficient manner. The core classes in QtXml include classes for representing the XML document itself, nodes within the document, and mechanisms for navigating and querying the XML structure.

The primary class for parsing XML is `QDomDocument`. It takes an XML string or file and creates a Document Object Model (DOM) representation of the XML. This DOM allows for easy traversal of the XML tree, accessing elements, attributes, and text content. Developers can create new XML structures or modify existing ones using `QDomElement`, `QDomNode`, and `QDomAttr` objects.

QtXml also offers a SAX (Simple API for XML) parser through the `QXmlReader` interface and various handler classes like `QXmlContentHandler` and `QXmlErrorHandler`. While the DOM approach loads the entire XML into memory, the SAX parser processes the XML document sequentially, which can be more memory-efficient for very large files.

The module is designed to integrate seamlessly with other Qt modules, making it a convenient choice for applications that need to handle XML data. It supports standard XML features and provides a robust API for common XML processing tasks. QtXml is a valuable tool for developers working with configuration files, data exchange formats, and any scenario requiring XML manipulation within a Qt application.