Their feature modelling approach eschews the knowledge requirement on both the querying languages and system.To extract knowledge from unstructured Web sources, the authors examine two kinds of Web sources containing unstructured data: the source code from Web repositories and the posts in programming question-answering communities.
1 Introduction.- 2 Cache Based Optimization for Querying Curated Knowledge Bases.- 3 Query Performance Prediction on Knowledge Base.- 4 An Efficient Knowledge Clustering Algorithm.- 5 Knowledge Extraction from Unstructured Data on the Web.- 6 Building Knowledge Bases from Unstructured Data on the Web.- 7 Conclusion.