Research on Semantic Judgment of Key Words in Ontology - Based Dynamic Requirements Traceability

The accuracy of trace links can be improved by using ontology-based dynamic requirements traceability method, but it is a complicated and tedious process to establish a reasonable and effective ontology. Because the size of the ontology affects the experimental results directly, this paper shows a method to combine the modifiers with the general ontology. Firstly, the method makes semantic choices for the keywords through the collocation rules of the modifier and the keyword. Then the similarity of the keywords are calculated by the semantic distance in the WordNet and adjusted through the modifier ontology. The semantic choices of the keywords are reflected by the similarity scores. Finally, the similarity between the source artifacts and target artifacts are calculated by the similarity of the keywords. The number of modifiers is small in the requirements documents, design documents and etc. so this can reduce time and labor cost brought by the construction of domain ontology. In order to verify the effectiveness of this method, the method in this paper will be compared with VSM based methods and domain based ontology methods.