Crimson is a Java XML parser which supports XML 1.0 via the
following APIs: - Java API for XML Processing (JAXP) 1.1 minus
the javax.xml.transform package. JAXP is a pluggable API that
allows applications to access XML documents in a
parser-independent manner. It endorses the industry standard SAX
and DOM APIs and also adds a few classes under the
javax.xml.parsers package to implement pluggability and utility
methods Note: the javax.xml.transform package hierarchy of JAXP
is not implemented by Crimson. One implementation of
javax.xml.transform can be found at Xalan Java 2.

- SAX 2.0

- SAX2 Extensions version 1.0

- DOM Level 2 Core Recommendation