[uf-discuss] Values for rel/rev are case-insensitive in HTML (was: Nomenclature Question)

Scott Reynen scott at randomchaos.com
Thu Dec 8 13:47:37 PST 2005

Ryan King wrote:

>> »These link types are case-insensitive, i.e., "Alternate" has the  
>> same
>> meaning as "alternate".«
>> -- http://www.w3.org/TR/html401/types.html#type-links
> Yes, but <a rel=".."/> is different than <a Rel="..." />

What markup language are we talking about here?

In XHTML, <a Rel="..." /> is different in that it's invalid:


"XHTML documents must use lower case for all HTML element and  
attribute names."

In HTML 4, the two are identical:


"Attribute names are always case-insensitive."


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