Re: draft-ietf-html-style-00.txt & class as a general selector

lilley (lilley@afs.mcc.ac.uk)
Fri, 8 Dec 1995 15:09:00 +0000 (GMT)


> I like the '@' mnemonics. Perhaps we can rearrange our previous use of
> the character..
>
> > Which seems fairly regular and easy to parse - properly bracketed. Then
> > for notational convenience, when using CSS with HTML, we have the
> > following short forms:
> >
> > . means @CLASS =
> > # means @ID = or whatever token is chosen
>
> Having a shorthand for ID is not only a syntactical convenience;
> knowing that the attribute is unique will help implementors. We were
> thinking about a different shorthand:
>
> "x67y" { .. }

The trailing " does nothing, though, just as the trailing ] did nothing.

> > This gives a concise and regular notation, it seems.
>
> Yes, and is very much in line with CSS thinking. A few questions
> remain:
>
> - should one also allow the more verbose versions (CLASS=foo,
> ID=x67y) in CSS1?

I think so. This encourages people to build in parsing which is trivially
extended to cope with arbitrary attributes used in selectors when CSS2
arrives.

> - what do people prefer,
> -- #x65y or "x56y" ?
> -- @CLASS=foo or [CLASS=foo] ?

I guess I have already voted ;-) but should point out that the particular
representations of the delimiter tokens were just examples, albeit ones I
would be happy to live with. The important point was that each token should
mean something and that meaning should be explained in human-readable terms
somewhere near the beginning of the CSS 1 document. I was also aiming for
a situation where the parser need not backtrack or buffer; the meaning of
a string should be known before it is read, and everything should be
properly delimited and umambiguous.

-- 
Chris Lilley, Technical Author and JISC representative to W3C 
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