[whatwg] Context help in Web Forms
ian at hixie.ch
Tue Aug 5 13:44:13 PDT 2008
On Mon, 2 Jun 2008, Matthew Paul Thomas wrote:
> The disadvantage of using a data-* attribute is that more kinds of
> mistakes would be undetectable by a validator. It would have no idea
> that (a) the value of the attribute must be the ID of an element
> elsewhere in the document, and (b) each value must be unique within the
> I wonder if the data-* attribute naming scheme could be classified
> somehow to allow basic type checking like this. I expect there will be
> other cases where authors want an attribute value to match the ID of an
> element in the page.
On Tue, 3 Jun 2008, Henri Sivonen wrote:
> I don't like the idea of trying to encode the datatypes of data-*
> attributes in a validator-sensitive way. What datatypes would a
> validator support for data-* attributes? The HTML5 datatype library used
> by Validator.nu already contains 41 datatypes, but people will likely
> want to have others. The whole point of data-* is to provide a place
> where a validator doesn't go without authors having to abuse e.g. title
> which is a freeform but exposed to humans.
> The foreseeable problem with data-* is, of course, that microformat-like
> activity will happen there instead of going through the trouble of
> getting unprefixed validator-sensitive attributes minted with community
> review in the WHATWG and the HTML WG.
On Wed, 4 Jun 2008, Anne van Kesteren wrote:
> That'd be wrong as data-* does not allow implementation by UAs... Having
> said that, if we don't make it clear what the idea is that might end up
> happening in practice here and there.
I agree that not constraining data-* will lead to a validation "hole"
where people can't check that their data is matching their presumed
schema, but I think the right solution to this is for validators to offer
out-of-band ways to specify schemas for data-* attributes, not for the
spec to constrain the values, IMHO.
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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