Effectiveness of Syntactic Relationship in Document Retrieval
Yanan Li · Zhongwen xinxi xuebao · 2008
To relax the term independence assumption,term dependency is introduced and it has improved retrieval precision dramatically.There are two kinds of term dependencies: one is defined by term proximity,and the other is defined by syntactic dependencies.In: this paper,we take a comparative study to re-examine these two kinds of term dependencies in dependence language model framework and presents a smooth-based dependence language model.We studied the effectiveness of syntactic dependencies in query representation and document representation respectively.The experimental results on TREC collections show: 1) Syntactic dependencies get a better result than term proximity in document representation.2) In: query representation,concept-based part syntactic dependencies are more effective than other syntactic dependencies.