Concept-Based Querying Approach For each word,determine the concept it represents from context Use one or more ontologies: Hierarchical structure showing relationship between concepts E.g.,the ISA relationship that we saw in the E-R model This approach can be used to standardize terminology in a specific field Ontologies can link multiple languages Foundation of the Semantic Web(not covered here) Database System Concepts-6th Edition 21.13 @Silberschatz,Korth and SudarshanDatabase System Concepts - 6 21.13 ©Silberschatz, Korth and Sudarshan th Edition Concept-Based Querying Approach For each word, determine the concept it represents from context Use one or more ontologies:  Hierarchical structure showing relationship between concepts  E.g., the ISA relationship that we saw in the E-R model This approach can be used to standardize terminology in a specific field Ontologies can link multiple languages Foundation of the Semantic Web (not covered here)