2Karvounarakis G,et al.RQL:A Declarative Query Language for RDF.Proceedings of WWW2002,USA,2002,127-146.
3Li Y,Bandar ZA,McLean D.An approach for measuring sematic similarity between words using multiple information sources.Transactiohs on Knowledge and Data Engineering.2003.15(4):871-882.
4BRITE:Boston university Representative Internet Topology gEnerator.http://www.cs.bu.edu/brite/.
