[CSS3-selectors] ::selection pseudo

About ::selection pseudo, in particular "Applies to the portion of a 
document that has been highlighted by the user." [1]

Is it selector that defines some global object or is it supposed to be 
applied to particular elements too?

If later then what are the cascading/inheritance rules?

Let's say we have some <richtext> or just <div contenteditbale> on the 
page.
Then what would mean the following?:

richtext::selection
{
  background-color: highlight;
  color: highlight-text;
}

And how it will interact with say:

richtext p::selection
{
  color: white;
}

?

Will p::selection pseudo-element inherit background-color: highlight;
value or not? It appears that ::selection elements shall establish their
own inheritance chain so p::selection pseudo will inherit *all* attributes
of any ::selection object defined upstream.

I think that styleable ::selection in principle is a good thing,
just want to clarify how it can be used/implemented.


[1] http://dev.w3.org/csswg/selectors3/#UIfragments

-- 
Andrew Fedoniouk.

http://terrainformatica.com