Ahmad, R. ., M. Z. Hussain, Muhammad Zulkifl Hasan, and M. A. . Afaq. “Data Models, Semantics, Query Languages”. UCP Journal of Engineering &Amp; Information Technology (HEC Recognized-Y Category), vol. 1, no. 1, Oct. 2023, pp. 08-19, https://ojs.ucp.edu.pk/index.php/ucpjeit/article/view/165.