On Oct 3, 2011, at 14:12 , LuKreme wrote: > HTML 1.0, 2.0, 3.x, 4.x and 5 all are case-insensitive, though it is possible > that early specs required UPPER case tags (there certainly were a lot of > upper case tags back in the 90’s).
As far as I know the uppercasing of tags was a convention borrowed from SGML. But you're absolutely right about the case-insensitivity. I still know more than one person who writes their HTML using exclusively uppercase, as they insist that it makes it easier to separate tags from text -- and refuse to use editors more capable than Notepad or TextEdit. They complained mightily about XHTML's requirement for lowercase-only tags and will be relieved that HTML5 backtracks from that, but they're still not down with all this crazy new-fangled CSS stuff. - Watts
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