An Ontology-Based Subject Searching Framework for Online Public Access Catalogue (OPAC) Rout Rosalien1, Panigrahi Pijushkanti2, Bandyopadhyay Ratna3 1Librarian Malda Women's College, Malda-732101 2Department of Library and Information Science, University of Calcutta, Kolkata-700073 3Department of Library and Information Science, University of Calcutta, Kolkata-700073 Online published on 24 July, 2018. Abstract In this paper, we present a conceptual searching framework based on ontology to help users in query formation and make subject searching more effective in online public access catalogue (OPAC). The study proposes an ontology-based GUI through which users can visualize subject headings and interact with the GUI through a semantic-based process while searching. This model represents the library of Congress subject headings (LCSHs) in an ontological form which exposes the hierarchy of the subject headings as well as all stated relations among them. It facilitates context-based searching by replacing the keyword-based search and help users to formulate their query in such a format that, it will be more responsive for information retrieval. Top Keywords OPAC, Subject searching, LCSH, Ontology, Information Retrieval, Ontology-Based Semantic Model. Top |