Theuse of database technologiesfor implementingCBR techniquesis attractinga lot of attentionforseveralreasons. First, the possibilityof usingstandardDBMSfor storingand representingcasessignificantlyreducesthe effort neededto developa CBRsystem;in fact, dataof interest are usually alreadystoredintorelationaldatabasesandusedfor different purposesas well.Finally,the useof standardquerylan