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Permission is granted to quote short excerpts and to reproduce figures and tables from this report, provided that the source of such material is fully acknowledged. Abstract I t i s w e l l r e c o g n iz e d th a t th e e va l u a ti o n of t h e k n o w l e d g e-b a s e d s y s t e m is v e ry i m po r t a nt a n d d i f fi c u l t i n th e d e v e l o(More)
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