Top-N Keyword Search Based on Index Over Relational Databases

The authors provide a method based on an index and realize keyword search in the free form over relational databases.Using the saved knowledge,the authors create an index and improve the classic ranking strategy in Information Retrieval by assigning different weight values to attributes.Then the top-N answers are returned for a keyword query.Experimental results for a large real dataset indicate that the performance of the method is efficient and effective.