[WSG] id or class on html or body

[Mordechai Peller]

Putting an id or class on the html or body tags is a useful way of 
targeting slight variations in style rules with resorting to a second 
style sheet.

I remember seeing a discussion of the pros and cons, but I can't 
remember where. Does anybody have a link? Or perhaps the discussion can 
begin anew.

Thanks.
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