Querying Database Knowledge

The role of database knowledge 1susually limited to the evaluation of data queries In this paper we argue that when this knowledge 1sof substantial volume and complexity, there 1sgenuine need to query this repository of mformatlon Moreover, since users of the database may not be able to dlstmgulsh between mformatlon that IS data and mformatlon that 1sknowledge, accessto knowledge and data should be provided with a smgle, coherent instrument We provide an informal review of various kinds of knowledge queries, with possible syntax and semantics We then formalize a framework of knowledgerich databases, and a simple query language conslstmg of a pair of retrieve and describe statements The letrieve statement 1sfor querying the data (it corresponds to the basic retrieval statement of various knowledgerich database systems) The describe statement 1sfor querying the knowledge Essentially, it mqunes about the meaning of a concept under specified circumstances We provide algorithms for evaluat...

• Type: Conference
• Year: 1990
• Where: SIGMOD
• Authors: Amihai Motro, Qiuhui Yuan
• Keywords: Data Queries, Database, Database Knowledge, Knowledge Queries, SIGMOD 1990