Q. What is the key to gaining a real impact on efficiency in OBDA systems?

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Q. What is one of the key challenges in traditional database query languages like SQL?

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Q. Which approach in database systems employs recognition and direct manipulation objects to provide easy and intuitive user interaction?

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Q. What is the primary concern of usability in software systems, including database systems?

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Q. What is a key factor for the success of a system from a usability perspective?

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Q. What paradigm is considered crucial for capturing and communicating domain knowledge to end-users in database systems?

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Q. What is a key feature of any Ontology-Based Data Access (OBDA) system regarding the ontology?

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Q. Why is it unrealistic to expect all domain experts to formulate queries directly in a complex query language?

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Q. What is faceted search in the context of ontology-based systems?

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Q. How does faceted search benefit users in information retrieval?

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Q. When does faceted search encounter limitations in information retrieval?

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Q. What is a limitation of using ontology development tools like Protégé for query formulation?

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Q. What is the purpose of a "query by navigation" interface in ontology-based systems?

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Q. What is the significance of extending faceted search in ontology-based systems?

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Q. How does the navigational approach in query by navigation differ from traditional keyword-based approaches?

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Q. What is a potential application of query by navigation in the Semantic Web domain?

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Q. What is a key challenge of diagrammatic approaches and textual data browsers in the context of complex ontologies?

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Q. Why is it challenging for end-users, even those knowledgeable in their domain, to access data in some cases?

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Q. What is a necessary feature of a query formulation tool to help users understand complex ontologies?

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Q. What challenge arises when users want to list all digital cameras with ≥12 MP resolution based on complex ontologies?

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