Dear mmd,

the shapefiles were originated from Quantum Gis software, which is open source.
Moreover the plans were officially provided from the building office of "Sapienza" University of Rome .

With my warmest regards,

Michela

Dear Jan,

those tags descend from the shape files from which the map was created. For this reason, they will be removed as soon as possible.
The tag highway=footway is necessary to guarantee the beta navigation as Adrien Pavie suggested.

Cheers,

Michela