[whatwg] Adding obsolete elements/attributes to indexes

Ian Hickson ian at hixie.ch
Thu Jan 23 09:06:23 PST 2014

On Thu, 23 Jan 2014, Simon Sapin wrote:
> On 23/01/2014 08:54, Ian Hickson wrote:
> > On Thu, 23 Jan 2014, Simon Sapin wrote:
> > > 
> > > To help with "discoverability" of obsolete features by implementers, 
> > > I’d like them to be included in the Index section’s tables.
> > 
> > They're explicitly excluded to help with avoiding their discovery by 
> > authors.
> I see. I still wish there was a version of the indexes for implementers 
> :)

The index is non-normative and often has errors (maintaining it is a huge 
pain in the neck and even with automation, I make mistakes regularly -- 
that's one of the reasons it's non-normative). Please don't rely on it. 
Making it explicitly support implementors would risk this even more. :-)

> > > When considering what Servo should implement, I mistakenly concluded 
> > > that <li> elements do not have a 'type' attribute, based on the 
> > > Index. They in fact do, as specified in the Obsolete features 
> > > section.
> > 
> > Do you mean a type IDL attribute or a type content attribute? No IDL 
> > attributes are listed in the index. I don't know what it really means 
> > for an element to have a content attribute, from an implement's 
> > persective.
> I’m talking about HTML attributes. In this case <li type=A>Foo</i> 
> affecting rendering compared to just <li>Foo</li>.
> Perhaps "elements having an attribute" is not the right term, but "a 
> content attribute having meaning for the UA"?

I don't see any UA conformance criteria for the type="" content attribute 
anywhere in the obsolete section. Am I missing something?

The only conformance criteria I see regarding the <li> element's "type" 
attribute is in a style sheet block in the rendering section. It's not 
really anything special about the type="" attribute, it's just part of the 
rendering rules, just like the fact that it is display:list-item.

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'

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