جایگاه موضوع به منظور سازماندهی منابع اطلاعاتی در پایگاه‌های داده

The aim of the research is to understand the status of the subject field in databases. This study analyzes and evaluates the methods of using the subject field, examines the main reasons for its use, and explores the application and performance of the subject in the field of information organization activities. The research method is a comparative study on the use of subject-related fields. The statistical population includes 10 Persian databases and 12 foreign databases that are highly important among users and scientific institutions. The research findings indicate that information exploration on information websites is based on various types of fields such as title, author, document type, ISBN, ISSN, DOI, journal name, journal type, article type, and other fields. Each database has utilized multiple fields based on the available information and user needs. Additionally, the use of the subject field has been observed in 90% of Iranian databases in various ways. Among foreign databases, 100% have incorporated the subject field in different formats. In most cases, databases have utilized the keyword field to support the subject field or as a substitute for it. The results highlight that user needs, organizational goals, and the type of information services emphasize the importance of the subject field. The use of standard tools is crucial in validating the subject. Subject classifications in the form of hierarchy, citation, clustering, systematic classifications, indexing standards, and the use of artificial intelligence all play significant roles in organizing and structuring the subject.