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13. Structured Markup Processing Tools

Python supports a variety of modules to work with various forms of structured data markup. This includes modules to work with the Standard Generalized Markup Language (SGML) and the Hypertext Markup Language (HTML), and several interfaces for working with the Extensible Markup Language (XML).

`sgmllib` | Only as much of an SGML parser as needed to parse HTML.
`htmllib` | A parser for HTML documents.
`htmlentitydefs` | Definitions of HTML general entities.
`xml.parsers.expat` | An interface to the Expat non-validating XML parser.
`xml.sax` | Package containing SAX2 base classes and convenience functions.
`xml.sax.handler` | Base classes for SAX event handlers.
`xml.sax.saxutils` | Convenience functions and classes for use with SAX.
`xml.sax.xmlreader` | Interface which SAX-compliant XML parsers must implement.
`xmllib` | A parser for XML documents.