Abstract
As syllabi are very important documents that inform people, particularly students, of the contents of curricula in detail, the techniques for efficient retrieval of them are in keen demand. It is necessary for efficient retrieval to arrange the results of retrieval in the form assisting users' selection of documents, as well as to achieve high performance in recall and precision. In this research, we developed a new retrieval system where search terms are expanded with their synonyms and the results are displayed in the form of tree-like structures expressing the relationships among those semantically related terms. We have shown its usefulness through experiments.
