جستجوي موضوعي در فهرست هاي رايانه اي (اپك )

Online Catalog Subject Searching

The Online Public Catalog (OPAC) is an information retrieval system characterized by short bibliographic records, mainly of books, journals, and audiovisual materials available in a particular library. This is coupled with Boolean search interface and pa heterogeneous user problems for subject searching by end users. To perform effective subject searching in the OPAC system requires a wide range of knowledge and skills. Various approaches to improving the OPAC design for subject searching have been proposed and are revived in this article. The trend toward Web-based OPAC interfaces and the developments in internet and digital library technologies present frech opportunities for enhancing the effectiveness of the OPAC system for the subject searching.