- From: Gregory J. Rosmaita <oedipus@hicom.net>
- Date: Fri, 6 Mar 2009 15:03:30 +0000
- To: html5alt@lists.wisc.edu
- Cc: www-archive@w3.org
due to health problems, i was not online yesterday, and although i haven't yet caught up on this thread, i did want to clarify my thoughts in response to Gregg's reply to my initial post... aloha, gregg! perhaps i should have slept on it after all <grin> yes, each of the images in the 3 stages of a butterfly's life REQUIRE alt text and/or labelledby to provide them with unique and appropriate terse descriptions, just as each form control in a FIELDSET has its own LABEL defined for it, with the value of the LEGEND element providing a CAPTION-like function for the FIELDSET, so too does LEGEND provide a means of declaratively marking explicit bindings of groups of related objects, as in: <FIGURE aria-labelledby="l1"> <LEGEND id="l1">The Three Stages of a Butterfly's Life Cycle</LEGEND> <IMG alt="Stage 1: The larval stage." src="butterfly1.svg" longdesc="butterfly1.html"> <IMG alt="Stage 2: The pupal stage." src="butterfly2.svg" longdesc="butterfly2.html"> <IMG alt="Stage 3: The adult stage." src="butterfly3.svg" longdesc="butterfly3.html"> </FIGURE> the LEGEND applies to all three images as a collection of related objects, available, for example, in a screen reader situation, either through a verbosity setting or via an extended query, such as MagicKey+TAB reads the alt text of the individual graphic which has focus, MagicKey+TAB pressed twice rapidly (or with a moderator key) provides the user with the LEGEND which describes, tersely, the group to which the individual image belongs, so that the user can be made aware of: a) each individual image's terse alternative text; b) the grouping to which the image belongs (if it is one of a series presented in a FIGURE) or any other modality-specific content contained in HTML5's media-specific elements, including AUDIO, VIDEO, OBJECT and CANVAS; actually, if focus is on the graphic, i would require 3 levels of query: 1. what is the textual alternative for the graphical object with focus? 2. does the graphical object with focus belong in a grouping? if so, what is the "title" stroke name of the group? 3. please provide me with a detailed description of the graphical object with focus (read me the contents of the LONGDESC page referenced for the graphical image, if i am using synthesized speech, as if it is an embedded object, render it (if so a user sets her user agent) side-by-side, in a side-bar, or whatever other exposition strategy is offered by the user agent (and not just those provided by the user agent plus a plug-in plus a specific assistive technology product) does this make my line of thought any easier to follow, or have the crows of my cranium eaten the trail of thoughtcrumbs i attempted to leave behind me? most evolutionary paths end in dead ends, and HTML5 is chartered to evolve a language based on HTML 4.01, so it would not surprise me if what i took for an insight was merely an internal refraction... gregory. ----------------------------------------------------------------- Sometimes I think my writing sounds like I walked out of the room and left the typewriter running. -- Gene Fowler ----------------------------------------------------------------- Gregory J. Rosmaita: oedipus@hicom.net OR gregory@ubats.org Camera Obscura: http://www.hicom.net/~oedipus/ Oedipus' Online Complex: http://my.opera.com/oedipus/ -----------------------------------------------------------------
Received on Friday, 6 March 2009 15:04:19 UTC