Hi @Tob,
unfortunately, this is not possible in IfcDoc. I would implement it but I am a bit hesitant as I have no idea what technology bSI wants to use for this.
Another reason why I am a bit hesitant in implementing these functionalities is this thread: Mvdxml improvements. We are currently working on some improvements to the mvdxml format and I want to implement the novelties into a new IfcDoc release.