Fundamentals of database systems (2nd ed.)
Fundamentals of database systems (2nd ed.)
Fundamental graphical primitives for visual query languages
Information Systems
Natural language understanding (2nd ed.)
Natural language understanding (2nd ed.)
An Expectation-Driven Response Understanding Paradigm
IEEE Transactions on Knowledge and Data Engineering
Lk: A Language for Capturing Real World Meanings of the Stored Data
Proceedings of the Seventh International Conference on Data Engineering
An Exploratory Study of Ad Hoc Query Languages to Databases
Proceedings of the Eighth International Conference on Data Engineering
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Database users without sufficient understanding of database schemas are normally daunted by the task of query formulation. To alleviate these concerns, we have come up with a visual query system that allows users to express queries at the conceptual level. This interface works by representing a targeted database schema at the conceptual level and allows the user to enter restriction, projection and join conditions in an interactive fashion. The mapping between the conceptual level and the relational schema of a targeted database is accomplished via the usage of the knowledge representation language Lk. We have built a prototype that works with human genome databases.