Proposal of information retrieval method based on TPO metadata

To search the contents through WWW in consideration of user's circumstance condition, search engines should make use of some information such as current time, user's location, user's schedule and so on. We propose an information retrieval method that effectively uses both user's and content's metadata based on TPO (time, position, occasion). We implement a prototype of information retrieval system based on the proposed method, which consists of query generation part, contents matching part, and matched results scoring part. In our query generation part, we reduce user's overload of choosing metadata. And a user becomes possible to retry sorting the matching results.