JAXP 1.1 updates JAXP's support for the Document Object Model (DOM) and Simple API for XML (SAX) from 1.0 to 2.0. It also includes support for the Transformation API for XML (TRAX). The implementation uses the Apache Crimson parser and most of the Xalan 2 XSLT processor.
Sun describes JAXM as "enabling B2B messaging through the ebXML standard", "an API for packaging and transporting business transactions using on-the-wire protocols being defined by ebXML.org, Oasis, W3C and IETF."