*Background*: WCAG 2.0 itself is a stable document that does not change.
The WCAG guidelines and success criteria are designed to be broadly
applicable to current and future web technologies, including dynamic
applications, mobile, digital television, etc. For an introduction to
the WCAG documents, see the WCAG Overview
<https://www.w3.org/WAI/intro/wcag.php>. The supporting resources
published today (called W3C Working Group Notes) provide specific
guidance -- including code examples, resources, and tests -- and are
updated periodically to cover current practices for meeting WCAG.
*Updates*: These updates include edits made in response to public
comments received on previous versions of the documents. These documents
are published approximately every six months in order to ensure that
these changes are reflected reasonably quickly. The next publication is
expected in September 2016.