Have you seen TagCentral, my proposal from SOTM2010? osm.wiki/SotM_2010_session:_Tag_Central:_a_Schema_for_OSM

Also, Ilya Zverev is working on something sufficiently similar, it may be called TagCentral. I don’t know where this is now, I heard from him in December (2012) osm.wiki/RU:Catalog/Zverik

Have you considered one of the books about OSM, which do indeed collect a lot about OSM in one place, for example… http://www.openstreetmap.info/