AElfred2 and SAX2 Utilities

gnu.xml.aelfred2	This package contains Ælfred2, which includes an enhanced SAX2-compatible version of the Ælfred non-validating XML parser, a modular (and hence optional) DTD validating parser, and modular (and hence optional) JAXP glue to those.
gnu.xml.pipeline	This package exposes a kind of XML processing pipeline, based on sending SAX events, which can be used as components of application architectures.
gnu.xml.util	This package contains XML utilities, including SAX2 XML writers and a parser of DOM trees, plus a command line driver.

DOM2, implementing DOM Level 2

gnu.xml.dom

This is a Free Software DOM Level 2 implementation, supporting these features: "XML", "Events", "MutationEvents", "HTMLEvents" (won't generate them though), "UIEvents" (also won't generate them), "USER-Events" (a conformant extension), and "Traversal" (optional; no TreeWalker yet).

SAX and SAX2

org.xml.sax	This package provides the core SAX APIs.
org.xml.sax.ext	This package contains interfaces to SAX2 facilities that conformant SAX drivers won't necessarily support.
org.xml.sax.helpers	This package contains "helper" classes, including support for bootstrapping SAX-based applications.