We are using ontologies to represent the accessibility concepts in a structured way in order to enable access to this knowledge for recommendations and adaptations in OpenCourseWare systems.
This is done by extending the ACCESSIBLE ontology with concepts of IMS AfA. We decided to work on this ontology and guidelines based on a survey we established previously in the paper " Fostering accessibility for OpenCourseWare with semantic technologies - a literature review. In: 7th International Conference on Knowledge Engineering and Semantic Web (KESW ’16). pp. 241–256. Springer (2016) "
ACCESSIBLE ontology is the output of an EU project that comprises characteristics of disabled users according to the “International Classiﬁcation of Functioning, Disability and Health (ICF)” of the WHO, descriptions of assistive devices and software applications, web accessibility standards and guidelines (WAI-ARIA and WCAG 2.0), as well as assessment rules for mapping user requirements and constraints.
IMS AfA is a guideline and metadata speciﬁcation, based on the ISO/IEC24751-1:2008 standard, for developing accessible e-learning applications and resources with respect to the learner needs and preferences. It links the accessibility preferences of a learner through the AfA Personal Needs & Preferences (PNP) model to the learning objects deﬁned by the AfA Digital Resource Description (DRD).