dissimilar.  At the time of writing, there is one parser for 
   each of Java, C/C++ and Perl.
</P>
<P>
b) A set of components serving some purpose not directly 
   pertinent to XML parsing, but which are used in related 
   applications and are tightly bound, usually through internal
   API's, to one (or more) of the parser subprojects.  
</P>

<P>
4.4 Product.  Some deliverable (usually a binary or source
package) that a subproject releases to the public.  Subprojects
may have multiple products.
</P>

<P>