prefix is now s4bldg

Added
TTL and RDF/XML files with the provenance information to IFC in
BuildingSmart

Updates in requirements (needed to generate the provenance triples)

Updates in ENVI and BLDG diagrams

Changed property names and types.
Removed global restrictions.
Added local restrictions.

Remodelled the location of objects in buildings.

first version of the bldg with axioms in classes.

real ranges and complex numbers should be refined.

Updated ontology description.

First version of the bldg ontology including clases and properties

Raw RDF statements generated from GoogleRefine for the bldg extension.
No ontology added yet.