- we should get lifetime in PPP from lifetime or width
- add decay modes interface to PPP
- PDGID is in data should be an attribute of ParticleType

-- add installservlet target to Ant to install the servlet into Tomcats directory
-- Use of particular XML implementation should not be
   hard wired in
-- Servlet should be configurable at init time
-- extend the SAX exception to show problm and linenumber  
-- schema can be simplified!
-- CreateTexFile
-- Create TexYappiWriter