   OVERVIEW
   
   ASCC/Schematron.com Skeleton Module for ISO Schematron (for XSLT1 systems)
   
   ISO Schematron is a language for making assertion about the presence or absence
   of patterns in XML documents. It is typically used for as a schema language, or
   to augment existing schema languages, and to check business rules. It is very
   powerful, yet quite simple: a developer only need know XPath and about five other
   elements.
   
   This is an open source implementation of ISO Schematron in XSLT. Although ISO does
   not allow reference implementations which might compete with the text of the
   standard, this code has been compiled by Rick Jelliffe, inventor of Schematron
   and editor of the ISO standard; so developers can certainly use it as an 
   unofficial reference implementation for clarification. 
   
   This implementation is based on one by Oliver Becker. API documentation is 
   available separately; try www.schematron.com for this. Funding for this
   stylesheet over the years has come from Topologi Pty. Ltd., Geotempo Ltd.,
   and ASCC, Tapei.
   
   There are two versions of this skeleton: one is tailored for XSLT1 processors
   and the other is tailored for XSLT2 processors. Future versions of the
   XSLT2 skeleton may support more features than that the XSLT 1 skeleton.
