Re: OT Re: Converting HTML tags into uppercase using Perl

[grinder]

uppercase tags [...] are NOT allowed in xml

ww may wish to learn more about XML, or least be able to quote the specification chapter and verse in order to back up such a claim. I've been doing XML for years (and SGML before that) and I've never heard of such nonsense.

A start-tag is a Name, and a Name is one or more Letters (more or less, ignoring namespace issues), and a Letter may be drawn from many, many things, including, but not limited to, uppercase and lowercase letters.

See the section on logical structures in the XML specification for more information.

Update: my bad, I did ponder how ww could have come up with such an outlandish idea (because his/her advice is spot-on in general), and I failed to make the connection to XHTML. I just wanted to quash the meme before it got any further.

[Fletch]

I think he misspoke and meant "XHTML" rather than XML. While you are correct that XML allows upper-, lower-, and mixed-case tag names, the XHTML spec does specifically require lowercase:

4.2. Element and attribute names must be in lower case

XHTML documents must use lower case for all HTML element and attribute names. This difference is necessary because XML is case-sensitive e.g. <li> and <LI> are different tags.

http://www.w3.org/TR/xhtml1/#h-4.2