Paper title:     Patterns of Efficient Prolog Programs
Author:          Robert Hanmer
Contact:         Bob Hanmer
Email:           r.s.hanmer@lucent.com
US Mail:         R. S. Hanmer
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Abstract:
After a Prolog language program has been written and is working,
frequently it leaves much to be desired in terms of execution
"efficiency".  These seven patterns provide the first steps 
towards making the program more efficient.  "Efficiency" is defined
here as the reduction in inference steps.