Problem statement :     defining setting variable's in startup/environment's

                                shell for instance

                                   
Opportunity a): while substitution variable's are vogue ....

                         ability to include wild cards in the above context offer's a good vaible extensions to shell's.
                

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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
       http://ravishankarkv.tripod.com/projects.pdf
        ....apply appropriate
      'use-case' modeling, rationalize and arrive at a workable and feasible 
       solution both commercially and techinically viable.