This binary release of Sparta contains the following jar files:

sparta.jar

  This is the main jar and probably the one you want.  It has the fast
  DOM and SAX parser, a simplified though non-standard DOM API, and a
  query processor that takes an XPath subset.

thermopylae.jar

  This has everything in sparta.jar plus in addition it has a
  compatibilty layer that provides standard W3C SAX and DOM APIs to
  Sparta.

sparta-sax.jar

  This includes the minimum subset of sparta.jar required to support
  SAX parsing.  It does not include the DOM or XPath APIs.  Be warned
  that this packaging is experimental and there is no documentation
  yet he particular subset of the Sparta API included.  You might need
  to use "javap -classpath sparta-sax.jar com.hp.hpl.sparta...."  to
  see what subset of a classes methods are supported.

j2me-sparta.jar
j2me-sparta-sax.jar

  These are the same as sparta.jar and sparta-sax.jar except compiled
  to be compatible with J2ME for running, for example, on mobile
  phones.
