@jwouellette It seems that these days many have focused on IFD
Which including texture and also “material development” becomes important for “PDT”
This is why these days we hear this question constantly
And I think if buildingSMART wants IFD and IFC be integrated and work well with each other have to “reconstruct” IFC structure, and focus more on “Classification” and “Material Catalog/Dictionary” development
I say let’s drop IfcRoot, IfcOwnerHistory, and IfcObjectDefinition, …, and just have the end one
For instance an IfcWindow is just an entity → We can with “CLASSIFICATIONS” say that a window is an object, a product, an element, a building element