- From: Jason White <jasonw@ariel.ucs.unimelb.edu.au>
- Date: Fri, 14 Jul 2000 10:29:16 +1000 (EST)
- To: Web Content Accessibility Guidelines <w3c-wai-gl@w3.org>
I think Principle 1 has two aspects, and I have not been able to devise a formulation which adequately captures both of them: 1. It must be possible to present the content in any one of the visual, auditory or tactile modalities. This is why we require "textual equivalents"--because text can be rendered visually, auditorily or tactually. 2. When the content is rendered, we wish to preserve the modality-specific components (for instance the auditory and visual tracks of a multimedia presentation) as the user can work with, while providing equivalents for the remainder. For instance, if the user requires a completely visual presentation, we provide captions of auditory material and synchronize these with the visual track so that the original, visual component is preserved and rendered alongside the "text equivalent" (in the form of captions) of the auditory component. Thus there are two aspects to Principle 1: making it possible to render the content in any of the three modalities, but substituting only for those which are unavailable to the user (leaving the others intact). Proposed reformulations are welcome, as always.
Received on Thursday, 13 July 2000 20:30:47 UTC