?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Parallel+Processing+of+Graph+Reachability+in+Databases&rft.creator=O.+Wolfson%2C+W.+Zhang&rft.subject=Dynamical+Systems&rft.description=One+of+the+features+that+distinguishes+digital+libraries+from+traditional+databases+is+new+cost+models+for+client-access+to+intellectual+property.+Clients+will+pay+for+accessing+data+items+in+digital+libraries%2C+and+we+believe+that+optimizing+these+costs+will+be+as+important+as+optimizing+performance+in+traditional+databases.+In+this+paper+we+discuss+cost+models+and+protocols+for+accessing+digital+libraries%2C+with+the+objective+of+determining+the+minimum+cost+protocol+for+each+model.+We+expect+that+in+the+future+information+appliances+will+come+equipped+with+a+cost+optimizer%2C+in+the+same+way+that+today+computers+come+with+a+built-in+operating+system.+This+paper+makes+the+initial+steps+towards+a+theory+and+practice+of+intellectual+property+cost+management.&rft.date=1992-08&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpostscript&rft.identifier=http%3A%2F%2Fcogprints.org%2F482%2F2%2Fwolfson.ps&rft.identifier=++O.+Wolfson%2C+W.+Zhang++(1992)+Parallel+Processing+of+Graph+Reachability+in+Databases.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F482%2F