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Managing the mappings between domain ontologies and database schemas when formulating relational queries

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Figure

Figure 1: The OntoQF architectural framework
Figure 2: OntoQF domain metadata representation and ontology-database mappings
Figure 4 shows entities E1 and E2 in a relational schema R(E). Here, both R(E1) and R(E2) contain domain metadata and there is a ‘one to one’ relationship from R(E1) to R(E2)
Figure 5: Ontological representation of domain metadata with 1:M relationships between entity E1 and E2
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