Re: [whatwg] HTML syntax: shortcuts for 'id' and 'class' attributes

Taken off www-style since it's so off-topic.

On Thu, 30 Nov 2006, Andrew Fedoniouk wrote:
> 
> Ian, what does this "backward compatibility" mean?

Language v1 is backwards compatible with language v2 if:

   * Documents written in language v1 work in UAs for language v2 the 
     same way they do in UAs written for language v1.

   * Documents written in language v1 can have features from language v2 
     added without affecting parts of the document that do not use those
     features.

   * Documents written in language v2 can display in UAs for language v1
     and still be usable (though maybe not all the functionality will be
     present).

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