OWL

The Web Ontology Language (OWL) is a W3C standard for defining and instantiating formal ontologies on the web, enabling machines to interpret the meaning and relationships of information rather than just displaying it. OWL supports accessibility by contributing to the Semantic Web vision where content carries explicit, machine-readable meaning, allowing assistive technologies to provide richer contextual information and enabling more intelligent content adaptation for users with disabilities. OWL ontologies can also formally describe accessibility requirements, user capabilities, and content characteristics, supporting automatic matching of content presentation to individual user needs.