Modelling Uncertainty in Ontology for The Semantic Web Using Vague Graph Theory. Journal of Pure and Applied Sciences (Science Forum), [S. l.], v. 20, n. 1, 2026. DOI: 10.70882/d50vgd54. Disponível em: https://atbuscienceforum.com.ng/index.php/jpas/article/view/478. Acesso em: 3 sep. 2026.