[Bug 26869] alt text length

https://www.w3.org/Bugs/Public/show_bug.cgi?id=26869

--- Comment #2 from steve faulkner <faulkner.steve@gmail.com> ---
the current text about alt text length which was agreed on 4 months ago:


"How long should a text alternative be?

A text alternative for an image should be as long as it needs to be to
adequately convey the information in the image, in the context the image is
being used.
How long should an alt text be?

While there are no definitive right or wrong lengths for text alternatives
provided using the img element's alt attribute, the general consensus is that
if the text alternative is longer 30-50 words (2 to 3 sentences), it should not
be considered a short text alternative and should not be presented using the
alt attribute. Refer to the section - Graphical Representations: Charts,
diagrams, graphs, maps, illustrations for example methods of providing longer
text alternatives for images.
Note

A text alternative provided using the alt attribute is exposed to screen reader
users as a text string, generally announced as a chunk, and cannot be
structured into paragraphs or have other markup added to aid comprehension."
http://w3c.github.io/alt-techniques/#m5

How does the additional complication of this advice around the issue of alt
text display in browsers help a developer to write good alt text?

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Received on Wednesday, 15 October 2014 09:26:33 UTC