简介：Thispaperproposestheprincipleofcomprehensiveknowledgediscovery.Unlikemostofthecurrentknowledgediscoverymethods,thecomprehensiveknowledgediscoveryconsidersboththespatialrelationsandattributesofspatialentitiesorobjects.Weintroducethetheoryofspatialknowledgeexpressionsystemandsomeconceptsincludingcomprehensiveknowledgediscoveryandspatialunioninformationtable(SUIT).Intheory,SUITrecordsallinformationcontainedinthestudiedobjects,butinreality,becauseofthecomplexityandvarietiesofspatialrelations,onlythosefactorsofinteresttousareselected.Inordertofindoutthecomprehensiveknowledgefromspatialdatabases,anefficientcomprehensiveknowledgediscoveryalgorithmcalledrecycledalgorithm(RAR)issuggested.
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