Youssef, Fatima Y., and Zainab I. Othman. 2023. “The Hierarchical Classification for The Rituals of Hajj Using Ontology”. Journal of Al-Qadisiyah for Computer Science and Mathematics 15 (1):Comp Page 79-95. https://doi.org/10.29304/jqcm.2023.15.1.1142.