When I use IFC exporting tools such as IFC manager I find the information always loose. For example, if I use IFC manager to export a single wall and open it in revit, I find that the only feature of the “wall” is that the category column shows it is a “wall”type, but the “wall” cannot be edited in the right way. For example, it cannot be assigned to a certain family and the thickness can be changed .I read the IFC document and find that in order to add the feature of “thickness” the information below needed to be added.
And I also learned that using set_classification_value method to set certain key value of certain dictionary in ruby api can add IFC information in skethup model. The question is to add such information which dictionary and key value should I set?