# Standards

The World Wide Web Consortium (W3C) Web Accessibility Initiative (WAI) develops web accessibility standards for the different components:

# Web Content Accessibility Guidelines (WCAG)

WCAG 2.1 (opens new window) extends on WCAG 2.0 (opens new window) and allows implementation of new technologies by addressing changes to the web. The W3C encourages use of the most current version of WCAG when developing or updating Web accessibility policies.

# WCAG 2.1 Four Main Guiding Principles (abbreviated as POUR):

# Web Accessibility Initiative – Accessible Rich Internet Applications (WAI-ARIA)

W3C's WAI-ARIA provides guidance on how to build dynamic content and advanced user interface controls.