Paper: A Study on Effectiveness of Syntactic Relationship in Dependence Retrieval Model

ACL ID I08-1026
Title A Study on Effectiveness of Syntactic Relationship in Dependence Retrieval Model
Venue International Joint Conference on Natural Language Processing
Session Main Conference
Year 2008
Authors

To relax the Term Independence Assump- tion, Term Dependency is introduced and it has improved retrieval precision dramati- cally. There are two kinds of term depend- encies, one is defined by term proximity, and the other is defined by linguistic de- pendencies. In this paper, we take a com- parative study to re-examine these two kinds of term dependencies in dependence language model framework. Syntactic rela- tionships, derived from a dependency parser, Minipar, are used as linguistic term dependencies. Our study shows: 1) Lin- guistic dependencies get a better result than term proximity. 2) Dependence retrieval model achieves more improvement in sen- tence-based verbose queries than keyword- based short queries.