> relative URLs. The "HREF" attribute must be an absolute URL. Note
> that, in HTML, element and attribute names are case-insensitive.
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> ^^^^^^^^^^^^^^^^
>
> This seems to me ambiguous: does it mean the `name' of the attribute,
> or its `value', or both? Five HTML, SGML, and XML books that I
It means the name. However this is academic as the current W3C
specification is XHTML 1.0 and XML *is* case sensitive. XHTML
element names *must* be lower case. I think the same is true of
attribute names.