com.hp.hpl.sparta A light-weight, simplified XML parser, DOM, and XPATH interpreter.
com.hp.hpl.sparta.xpath XPath parse trees over which Visitor objects can traverse to apply the XPath expression to DOM nodes.
com.hp.hpl.thermopylae Standard W3C DOM wrappers around the sparta non-standard DOM so that it can be used by packages such as Xalan that require the standard DOM.
com.hp.hpl.thermopylae.fatpath Apply XPath expressions to standard W3C DOM trees.