Syntax for ARIA: Cost-benefit Analysis (Accessified Table)

NOTE: This is an excerpt from the Q&A Web Log entry, Syntax for ARIA: Cost-benefit Analysis (Henry Thompson)

Passive support	HTML 4.01	XHTML (as if HTML) ^{Note 0}	XHTML (as XML)	SVG
Notes: 0 This column applies to the IE family, and to other browsers whenever treating XHTML as HTML 1 Firefox 2.0.0.14, IE7 + Adobe 3.03 SVG plugin 2 All browsers which treat XHTML as XML 3 Firefox 2.0.0.14 (unable to test IE+plugin so far) 4 Except IE family 5 If attribute selectors supported at all, i.e. not IE5, IE6 It should be noted that some of the entries above disagree with assertions made in the past about browser behaviour. At least some of those assertions were based on flawed test materials -- see the discussion of experiments 1 and 2 in my testing report for details on the information summarised above.
Allowed at all	colon: Yes, by 'should ignore' advice dash: Yes, by 'should ignore' advice	colon: Yes, by 'should ignore' advice dash: Yes, by 'should ignore' advice	colon: Yes, by 'must ignore' rule dash: Yes, by 'must ignore' rule	colon: Yes, by 'must ignore' rule dash: In principle,no in practice ^{Note 1}, yes
Available via DOM	colon: Yes, via GetAttribute dash: Yes, via GetAttribute	colon: Yes, via GetAttribute dash: Yes, via GetAttribute	colon: Yes ^{Note 2}, via GetAttributeNS and GetAttribute dash: Yes ^{Note 2}, via GetAttribute	colon: Yes ^{Note 3}, via GetAttributeNS and GetAttribute dash: Yes ^{Note 3}, via GetAttribute
Matches CSS selector	colon: Yes ^{Note 4}, using `[aria\:attr]` dash: Yes ^{Note 5}	colon: Yes ^{Note 4}, using `[aria\:attr]` dash: Yes ^{Note 5}	colon: Yes, using `[aria\|attr]` dash: Yes ^{Note 5}	colon: No dash: No