Evaluation of Syntactic Phrase Indexing -- CLARIT NLP Track Report

The CLARIT NLP track effort is focused on evaluating the usefulness of syntactic phrases for document indexing. AA. are inclined to propose the following two hypotheses : 1) the use of lexical atoms, such as hot dog, to replace single words for indexing would increase both precision and recall; 2) the use of syntactic phrases, such as junior college to supplement single words would increase precision without hurting recall and using more such phrases results in greater improvement in precision