http://xml.org/sax/features/namespaces
http://xml.org/sax/features/namespace-prefixes
http://xml.org/sax/features/string-interning
If true, then all element names, prefixes, attribute
names, Namespace URIs, and local names are internalized using
java.lang.String.intern().
If false, then names are not necessarily internalized.
access: (parsing) read-only; (not parsing) read/write
http://xml.org/sax/features/validation
If true, then report all validation errors
If false, then do not report validation errors.
access: (parsing) read-only; (not parsing) read/write
http://xml.org/sax/features/external-general-entities
If true, then include all external general (text) entities.
false: Do not include external general entities.
access: (parsing) read-only; (not parsing) read/write
http://xml.org/sax/features/external-parameter-entities
If true, then include all external parameter entities, including the external DTD subset.
false: Do not include any external parameter entities, even the external DTD subset.
access: (parsing) read-only; (not parsing) read/write
adapted from SAX2 documentation by David Megginson