Problem statement:  understanding and interpretations of document versioning

                    understanding and interpretations of document[s] compression

               Currently there are several file formats that support compression
               say such as .zip , .tar ,.bzip ...etc.

Opportunity: can be usable in collabration , communication ...in office automation
             and group-ware solutions ...that supports versioning.

             Must document verision solutions currently support authentication by
             a password ...integrating central repositories with ldap and pgp

             ...better means or opportunity to check-in the document as also potential
             tracking or identification of the user checking the document.
       

Note: The above problem statement having been encountered in various scenarios
      and detailed in various 'Proof of concepts' as mentioned in 
      'http://uk.geocities.com/ravivenkatus/projects.pdf' ....apply appropriate
      'use-case' modeling, rationalize and arrive at a workable and feasible 
       solution both commercially and techinically viable.