Hello, and welcome to OSM.

I wish there was a nicer way of welcoming you to OSM, but unfortunately, this message is to alert you that the way you have edited the map so far is incorrect and destructive.

Dealing with buildings in OSM is an advanced technique, even more when it comes to splitting buildings.  In this changeset, you erased one building to draw multiple named structures instead, adding all sort of fancy tags suggested by the online editor.  This is not the way we map buildings in OSM; buildings outlines in Brussels are obtained by UrbIS numerical imagery, and NEVER by tracing on (distorted) aerial pictures, because those pictures do not show the real location of buildings.

We could save the name of the buildings, as building parts.  Some third-party apps like the main layer on osm.org won’t show the names but they are in the database anyway, so please do not touch.

Thanks in advance.