| Container Spatial Element | C | Container Spatial Element | Geometry | 
| BuildingSystemType | T | IfcBuildingSystemTypeEnum(0=NOTDEFINED 1=USERDEFINED 2=REINFORCING 3=MOORING 4=OUTERSHELL 5=TRACKCIRCUIT 6=EROSIONPREVENTION 7=FOUNDATION 8=LOADBEARING 9=SHADING 10=FENESTRATION 11=MOORINGSYSTEM 12=TRANSPORT 13=PRESTRESSING) | Integer | 
| Global ID | G | Optional Global identifier (GUID) formated to IFC string syntax.  Automatic assignment if empty | Text | 
| Name | N | Project Name | Text | 
| Desc | D | Optional Description | Text | 
| Long Name | L | Optional Long Name | Text | 
| Tag | T | Tag | Text | 
| User Defined Type | U | Optional User Defined Type | Text |