common image use example missing from current draft

Hi all.
proposed addition to image alt examples on spec

A common use of an image that is not currently covered in the examples
provided:
when an image is the sole content of a link:

<a href="homepage.html"><img src="logo.jpg" alt ="home"></a>
In cases where an image is the sole content of a link then the alt content
should be a brief description of the link target.

references:

RNIB: (
http://www.rnib.org.uk/xpedio/groups/public/documents/PublicWebsite/public_alttext.hcsp
)
"*Functional images* must have ALT text that adequately describes the
function of the image. Functional images include buttons, images used as
links, buttons and linked icons."

Webaim; functional images (http://webaim.org/techniques/alttext/#functional)
University of Texas: Example: alt Text for Functional Graphics (
http://www.utexas.edu/research/accessibility/resource/how_to/graphic/functionalimage/functionalimage.html
)

uni of illinous: Text Equivalents Overview (http://html.cita.uiuc.edu/text/)
-- 
with regards

Steve Faulkner
Technical Director - TPG Europe
Director - Web Accessibility Tools Consortium

www.paciellogroup.com | www.wat-c.org
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