Question: 4.5. Discuss user-defined and attribute-defined specializations, and identify the differences between the two. 4.15. Discuss the similarities and differences between an ontology and a database

4.5. Discuss user-defined and attribute-defined specializations, and identify the differences between the two.

4.15. Discuss the similarities and differences between an ontology and a database schema.

Book reference: Database system 7th edition

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