widgets do not provide a way to convey semantic information to the user agent. WAI-ARIA (Accessible Rich Internet Applications) is a specification published by the World Wide Web Consortium that specifies how to increase the accessibility of dynamic content and user interface components developed with Ajax, HTML, JavaScript and related technologies. ARIA enables accessibility by enabling the author to provide all the semantics to fully describe its supported behaviour. It also allows each element to expose its current states and properties and its relationships between other elements. Accessibility problems with the focus and tab index are also corrected. See also Accessible publishing Augmentative and alternative communication Blue Beanie Day Computer accessibility Device independence Digital divide European Internet Accessibility Observatory Knowbility Maguire v Sydney Organising Committee for the Olympic Games (2000) Multimodal interaction Progressive enhancement Universal design Web Accessibility Initiative Web engineering Web interoperability Web literacy References The basic WCAG requirements – What you need to start develop with WCAG, 2018 Designing Offline-First Web Apps by Alex FeyerkeDecember 04, 2013 Further reading External links How To Design For Accessibility (BBC) Inclusive Design Principles Apple Developer Accessibility Resources Web Accessibility Checker BBC GEL Technical Accessibility Guides Google Developer Accessibility Resources Microsoft Developer Accessibility Resources W3C WCAG Developer Accessibility Resources A Curated List of Awesome Accessibility Tools, Articles, and Resources Standards and guidelines W3C – Web Accessibility Initiative (WAI) W3C – Web Content Accessibility Guidelines (WCAG) 2.0 Equality and Human Rights Commission: PAS 78: a guide to good practice in commissioning accessible websites (which BS 8878 supersedes) European Union – Unified Web Evaluation Methodology 1.2 University of Illinois iCITA HTML Accessibility Best Practices BBC GEL Product Accessibility Guidelines BBC GEL Subtitles (Captions) Guidelines BBC Editorial Accessibility Guide (Online and TV) Accessible information Web design Usability