[OSM-newbies] Interior ring with Potlatch?

[Mike N.]

> I had a similar case over here of multiple buildings touching each other. 
> I
> decided to have them share ways although JOSM's validator complains about 
> it.
> If anyone has a better practice please share it with me.

  I didn't remember that the validator complains ... you do need to be 
careful to be sure that all common nodes are shared by both buildings. 
Otherwise it's easy to have them cross by a barely visible amount, and the 
validator notes the 'Crossing Ways'.