Importing base parameters.

Per [this ](https://github.com/OpeningDesign/FreeMVD_WorkFlow/blob/6528e16f1e2b7447fcfe0950ad0f1f8e11afa9b0/Specifications%20test%20files/Base%20Parameters/from%20Revit/Base%20Parameters_02.ifc#L187)IFC file, the following parameters were exported from Revit.

```
#282= IFCPROPERTYSINGLEVALUE('Comments',$,IFCTEXT('Testy - Comments'),$);
#283= IFCPROPERTYSINGLEVALUE('Mark',$,IFCTEXT('Testy - Mark'),$);
```

Is it currently possible to import these parameters back into Revit?

Test files [here](https://github.com/OpeningDesign/FreeMVD_WorkFlow/tree/6528e16f1e2b7447fcfe0950ad0f1f8e11afa9b0/Specifications%20test%20files/Base%20Parameters/from%20Revit).

Start with the linked Base Parameters_02.ifc file, especially the IFCPROPERTY SINGLEVALUE entries for Comments and Mark, and review the accompanying test files in the Base Parameters/from Revit directory. Trace the existing IFC-to-Revit import behavior for these parameters and document whether they are supported; done means the import result is verified against the supplied test files.

Written by the indexing model from the issue text.