“…In addition to incorporate the use of the World Wide Web Consortium (W3C) Web Content Accessibility Guidelines (WCAG) in the context of MOOC [23, 24, 27-30, 33-36, 38, 39, 43, 44, 46-48, 50, 51, 55-57, 59, 60], other guidelines, standards, and specifications should be more deeply studied, e.g. the W3C Authoring Tool Accessibility Guidelines (ATAG) [35,36,44,46,50,55,59], W3C User Agent Accessibility Guidelines (UUAG) [35,36,44,46,55], W3C Website Accessibility Conformance Evaluation Methodology (WCAG-EM) [44,46,56], W3C Web Accessibility Initiative Ageing Education and Harmonization (WAI-AGE) [23], Guidance on Applying WCAG to Non-Web Information and Communications Technologies (WCAG2ICT) [44], W3C Mobile Accessibility Task Force [44], IMS Access for All (AFA) Personal Needs and Preferences (PNP) [41,55,57,58], IMS AFA Digital Resource Description (DRD) [36,41,55,58], IMS Learner Information Profile (LIP) [58], IMS AFA Learner Information Package Accessibility for LIP (ACCLIP) [36,41,55,57,58], IMS AFA Meta-data Information Model (ACCMD) [36,41,55,58], IMS Accessible Portable Item Protocol (APIP) [36,55], Learning Resource Metadata Initiative (LRMI)…”