ATAG & CVAA Compliance Guide

For platform builders and communication-heavy websites, accessibility isn’t just about the content but also the tools and media.

Authoring Tool Accessibility Guidelines (ATAG)

The Authoring Tool Accessibility Guidelines (ATAG) were developed by the W3C to ensure that the tools we use to create content (like Wix, WordPress, and custom CMSs) are accessible.

1. Helping Your Users Create Accessible Content

If you build a CMS or site-builder, integrating Sienna as a default feature helps your end-users (the authors) provide an accessible experience to their visitors.

• Built-in Accessibility: Providing Sienna as a default “UI Layer” for all sites built on your platform.

Communications and Video Accessibility Act (CVAA)

The CVAA was passed in the US to ensure that individuals with disabilities have access to modern communication technologies.

1. Enhancing Communication Interface

For platforms that provide messaging, video, or community features, Sienna addresses the UI accessibility layer:

• Video Interface Toggles: Using Sienna’s high-contrast mode can help users with vision impairments navigate your video controls.
• Motion Suppression (CVAA-201): Allows users to pause flashing video thumbnails or animations in a message feed, critical for those with vestibular disorders.
• Text Reflow (CVAA-202): Simplifies message reading for those with low vision.

Implementation for Platforms

• Global Injection: Add the Sienna script to your platform’s base layout so it is automatically included in every user-generated site.
• Customization: Use our API/Customize tool to allow your users to brand their own widget.
• VPAT Readiness: Including Sienna in your platform’s core code helps you clearSeveral “No” or “Partial” items on your platform’s VPAT.

Strategy for Platforms

1. Deploy: Add the Sienna script to your platform’s template.
2. Declare: Include Sienna’s accessibility features in your platform’s Accessibility Statement.
3. Audit: Focus your structural auditing on ensuring that your platform generates semantic, keyboard-navigable HTML.