Proposal for a definition of Universal Digital Accessibility - UDA

The main objective is to establish a conceptual definition of Universal Digital Accessibility (UDA), based on legislation, standards, and specialised literature. The concept of accessibility, originally associated with geography and urban transport, later developed its own theoretical framework within linguistics, and has recently become widely associated with urban mobility. This study takes a qualitative approach, based on a theoretical and normative review, The methodological process was structured in four stages: 1) literature review and analysis; 2) analysis of legislation and standards; 3) structuring and transposition of concepts; 4) Relationship of digital accessibility and artificial intelligence. This study was built on established references in physical accessibility – including standards, legislation, indicators, and foundational concepts, as well as the principles of universal design – integrating them with content related to digital accessibility. Although the term "digital accessibility" already has definitions in certain fields, the innovative contribution of this research lies in the development of a new definition grounded in the convergence of these references. The proposed definition seeks to expand the understanding of digital accessibility beyond websites and online platforms, incorporating multiple perspectives and contexts of application.