[ABD CE U3] ItemTypes support and IFC export


After a couple of month I'd like to restart this former discussion about compatibility between "ABD objects" organized in family / part structure and Item Types as standard CONNECT Edition way how to attach custom data to elements.

The problem is that Item Types are ignored when objects are exported to IFC, regadless the object is generic MicroStation geometry, MicroStation geometry converted to ABD part or an object created by ABD tools. In GUI it looks like this:

... walls are correctly exported to IFC, but all Item Types (named Extra data in this case) are cut off and lost.

I agree with (a quote from the original discussion):

Items are seemingly now the primary form of adding properties to MicroStation-speciifc applications and not being able to get that information over to a platform neutral ISO-standard file format (ie IFC) is becoming a crucial issue.

Often not everything is created in ABD, project participants can use MicroStation only to create specific parts of model, or the data can be shared from other solutions (e.g. Revit) using i-model. In such situation all EC data (Item Types) are lost, which is quite big problem. E.g. here in Czech Republic, based on government decisions from last year, all public building contract over some amount/size is required to be created in accordance to BIM from 2022. Because of this change with all building industry impact solution providers are closely cooperating with engineering and construction companies to be prepared (as far as I know Bentley has ignored it, I don't know about any such local Bentley activity).

When I talked with people from BIM SIG and BIM group, who try to be independent from one particular solution, they are quite pesimistic about using ABD to produce IFC and to use ItemTypes in any BIM worklow where IFC is a final format, because combination of products cannot ensure data will be maintained and not lost.

My questions are:

  • Are Item Types (and EC data) supported in IFC support in AECOsim Building Designer Update 3? Because my knowledge of ABD is limited, maybe I have done some mistake.
  • Is such support planned?
  • When? If the answer is "yes, we would like to add this feature in future, but it's not scheduled yet", it can be translated as "maybe in 2019" and it's too late and maybe it will be more efficient to try to implement some workaround using MicroStation and ABD SDK.

With regards,


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