XML

XSLT (Extensible Stylesheet Language Transformations) is a language for transforming XML documents into other XML documents, HTML, or plain text.

XPath is a query language for selecting nodes in an XML document. It uses a path notation similar to filesystem paths and is supported in XSLT, Python, and most XML …

An XML Schema Definition (XSD) describes the structure and data types allowed in an XML document. It provides stricter validation than a DTD.

A well-formed XML document follows strict syntax rules. Violating any of them is a fatal error; parsers will refuse to process the document.

XML (Extensible Markup Language) is a text-based format for storing and transporting structured data. It is both human-readable and machine-parseable.