IFC import custom attributes

Hi all,

I was trying to import IFC model into V6 and custom attributes were not imported because they are missing in the schema. That is clear. I added Customer Extension to hold these attributes, as it is described in the Doc (https://help.3ds.com/2019x/english/dsdoc/cegusermap/ceg-c-extensionsadd.htm?contextscope=all), but that was not enough.

Probably some XML files should be also corrected at Native Client side, but which one and what should be inside?

Do I need to correct only XML at native client or do I need to create a resource table (which one)?

It seems that something with XML should be done, but what exactly (the minimal amountof actions to do to get custom attribute into imported model)

If you have, please share as much info as you have regarding this, it will be very appreciated. Thx! )