Clarification of case where 'there simply is no text that can do justice to an image'

The current HTML5 spec contiains this expalnation and example of a
conforming alt text [1]:

"Sometimes there simply is no text that can do justice to an image.
For example, there is little that can be said to usefully describe a
Rorschach inkblot test.

<figure>
<img src="/commons/a/a7/Rorschach1.jpg" alt="{inkblot test}">
<legend>A black outline of the first of the ten cards
in the Rorschach inkblot test.</legend>
</figure>"


In light of the example in the spec, is the following conforming to
HTML5 or not?

<figure>
<img src="/commons/a/a7/Rorschach1.jpg" alt="a black vertically
symmetrical shape, which contains 4 small white areas and 9 smaller
black blotches seperated from the main body of the shape.">
<legend>A black outline of the first of the ten cards
in the Rorschach inkblot test.</legend>
</figure>


[1] http://www.w3.org/html/wg/html5/#a-key

-- 


Stevef