Design of Pretreatment for Keyword-Based Search over Network Teaching Resource Database

How to find the teaching resources according to users´ demand quickly and accurately on the Internet is urgent to be solved. This paper proposes a design of pretreatment for keyword-based search over network teaching resource database based on ontology. Firstly, the teaching ontology is created according to the teaching background by the relational database firstly. And then, an oriented and labeled relation scheme diagram is constructed in which the node represents ontology and the edge represents the relationship of nodes. Next, the candidate tuple set join tree scheme based on this scheme diagram is built. Finally, the candidate tuple set join tree is generated. The candidate tuple set join tree obtained from this pretreatment can provide the results of keyword-based search over relational database directly, shorten the search time and perform better in supporting the query ability of relational database.