Controlled terms or free terms?; A JavaScript library to utilize subject headings and thesauri on the web

Nagaya, Shun; Hayashi, Yutaka*; Otani, Shuhei*; Itabashi, Keizo

Metadata is powerful tool for information organizing. There are two kinds of "keyword" used as the metadata, "free term" and "controlled vocabulary". There is an advantage that metadata creators can freely select the "keyword" by using a free term. However, there is a disadvantage that the retrieval leakage can be caused in information retrieval. On the other hand, the search accuracy can be improved using a controlled vocabulary. However, creating and management of a controlled vocabulary need manpower. In addition, the existing controlled vocabulary is paper, PDF, HTML, hard to use such a format. In this article, proposes to use "controlled vocabulary" as a metadata. We develop and release of JavaScript libraries for using controlled vocabulary as a metadata on the web service user (including PHP script). This JavaScript library supported using 10 thesauri and subject headings. FAST, NDLSH, Wikipedia Thesaurus, INIS Thesaurus, MeSH, and so on. Our final target is to create a mechanism using metadata across web-service, including free term.