SAX: http://www.saxproject.org/
DOM Level 1: http://www.w3.org/TR/1998/REC-DOM-Level-1-19981001/level-one-core.html
DOM Level 2: http://www.w3.org/TR/DOM-Level-2-Core/
DOM Level 3: http://www.w3.org/TR/DOM-Level-3-Core/
JAXP: http://java.sun.com/xml/jaxp/
TRaX: http://nlp.stanford.edu/nlp/javadoc/xalan-docs/trax.html
JAXB: http://java.sun.com/xml/jaxb/
