TD with SCOPE passes test, but is obsolete in HTML 5

Name: Mark Rogers
Email: mark.rogers@powermapper.com
Affiliation: PowerMapper Software
Document: TD
Item Number: F91
Part of Item: Tests
Comment Type: technical
Summary of Issue: TD with SCOPE passes test, but is obsolete in HTML 5
Comment (Including rationale for any proposed change):
HTML 5 obsoleted TD SCOPE attribute, and says use TH SCOPE instead:
http://www.w3.org/TR/html-markup/td.html

Some common AT ignores scope, so treat this as a plain TD:
http://www.powermapper.com/tests/screen-readers/tables/table-th-scope/ 

Using TD SCOPE in HTML 5 triggers the following error in the W3 validator
The scope attribute on the td element is obsolete. Use the scope attribute on a th element instead.


Proposed Change:
Remove
5. headers marked up as td elements with the scope attribute