[Tagging] area=yes on polygones (was Block names)

[Anthony]

On Wed, May 2, 2012 at 4:53 AM, Pieren <pieren3 at gmail.com> wrote:
> On Tue, May 1, 2012 at 5:56 PM, Anthony <osm at inbox.org> wrote:
>
>> What about closed ways tagged with barrier=* and some other ambiguous
>> *=* (e.g. barrier=hedge & amenity=marketplace).
>
> No, the tag "barrier=*" is not ambiguous and is self explanatory (does
> not need to check any tag combination).

So you can't map a hedge or a city wall or a ditch as an area?  Why not?

What if we want to change this in the future?