ICADD

A non-profit organization that developed techniques for making structured electronic documents accessible to people with print disabilities. ICADD created the SDA (SGML Document Access) mechanism — a set of attributes that map complex document type definitions to a simplified accessible tag set — which was incorporated into the ISO 12083 standard for Electronic Manuscript Preparation and Markup. This was reportedly the first time disability accessibility requirements were directly built into an ISO standard for commercial publishing. ICADD's work laid conceptual groundwork for later web accessibility standards including WAI-ARIA's approach of mapping custom interface elements to accessible roles.