RE: on headings, labels, links, and image maps

Great quote David. I would recommend that we all quote the "Understanding 
WCAG 2,0" [note 1] often and/or suggest editorial comments to make it 
clearer as we gain experience using WCAG 2.0. 

I think a key phrase in understanding the intent  here is "When such 
sections exist", "For instance, long documents,". So I interpret this to 
mean that when long sections do not exist, for instance web application 
screens that are not documents and other short or small web pages with 
very little information - then 2.4.10 Section Headings (AAA) doesn't 
apply. So, any free checker application that reports that every page has 
to have nested headings is worth about what you paid for it. 

Should I send in an editorial suggestion to the editors to add a phase of 
when 2.4.10 does NOT apply? [See note 2]

Regards,
Phill Jenkins, 
IBM Research - Human Ability & Accessibility Center

Note 1 Understanding WCAG 2.0 http://www.w3.org/TR/UNDERSTANDING-WCAG20/
1.3.1 Level A Info and Relationships 
 
http://www.w3.org/TR/UNDERSTANDING-WCAG20/content-structure-separation-programmatic.html
2.4.10 Level AAA Section Headings 
 
http://www.w3.org/TR/UNDERSTANDING-WCAG20/navigation-mechanisms-headings.html

Note 2 
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