Standards and recommendations
There are a number of important standards that help improve the accessibility of web content and applications for blind and low vision people.
The Web Content Accessibility Guidelines (WCAG) 2.0 are the internationally accepted standard for the accessibility of web content and applications. They can equally be applied to intranet content. WCAG serve as a blueprint for many national accessibility directives.
The German Barrierefreie Informationstechnik-Verordnung (BITV) 2.0 sets the accessibility standard for web sites and other public information sources of German federal institutions. BITV 2.0 follows W3C's Web Content Accessibility Guidelines 2.0 with some minor additions.
A good foundation for accessible web content is the use of valid HTML (HyperText Markup Language). HTML5 is the latest version of HTML for the semantic mark-up of web content. While its developement has not yet been finalised as standard, HTML5 it is already being used as 'living standard' for the development of new web sites and applications.
For developers who strive to design web-based custom controls or content that go beyond the native capabilities of HTML elements, the W3C standard WAI-ARIA offers the possilbility of adding semantic markup to make these custom controls fully accessible.
The Mobile Web Best Practices 1.0 give recommendations to web developers who want to ensure that web content is well presented und usable on mobile devices. They are quite dated, having been released in 2008.
Mobile Web Application Best Practices