y environments or user groups. Each version should be as conformant as possible. One version would need to be fully conformant in order to meet conformance requirement 1." With regard to web pages designed with progressive enhancement this leaves the problem of which version to select as the one fully conformant version - all whilst trying to ensure that no set of users is disadvantaged by that choice.</p>
<p>One solution to this challenge is to select the pre-enhanced version of the web page (e.g. the DOM 