topic Re: IFC. Factory default mapping rules. in Collaboration with other software

IFC. Factory default mapping rules.

GOBA — Thu, 25 Jun 2020 10:30:12 GMT

Where can I see the factory default mapping rules? I see, for example, that there are some examples explained for beams, in this page, such as Name Attribute, IsExternal property and LoadBearing property:
https://helpcenter.graphisoft.com/graphisoft-archives/55687/

I’ve also seen that the Reference (Pset_BeamCommon), is made up of the material and the cross section. This is all right, but is there a list of default mapping rule? Could they be changed?

Re: IFC. Factory default mapping rules.

Christophe Fortineau — Fri, 26 Jun 2020 07:10:37 GMT

Hello GOBA,

Did you try to modify something here ?
File/Interoperability/IFC/IFC Translator
Then into Classification tab you are able to modify the correspondence between your Archicad classification and the IFC classification.

Re: IFC. Factory default mapping rules.

GOBA — Fri, 26 Jun 2020 07:50:58 GMT

Hi Chirstophe!

Yes, I have already tried that. What I mean, is that there are some factory default mapping rules, for example, as for beams:

"Examples for factory default mapping rules for IfcBeams:
- The Name Attribute is derived from the ARCHICAD Beam-classified element’s ID parameter (found in the Categories and Properties panel of Element Settings).
- The value of the IsExternal property (Pset_BeamCommon), either “True” or “False”, is derived from the corresponding ARCHICAD element’s Position classification (either “Exterior” or “Interior
- The value of the LoadBearing property (Pset_BeamCommon), either “True” or “False”, is derived from the corresponding ARCHICAD element’s Structural Function classification (either “Load-Bearing Element” or “Non-Load-Bearing Element”).

This is an example, using the ArchiCAD template:

I think that Reference (Pste_BeamCommon) is using a factory default mapping: Material + cross section

I would like to know all the factory default mapping, and if we can modify them, because I haven’t found anything in the translators.

Re: IFC. Factory default mapping rules.

Laszlo Nagy — Sun, 28 Jun 2020 11:23:49 GMT

There is some info about this in the Help file:

https://helpcenter.graphisoft.com/user-guide/89335/#XREF_36709_IFC_Attributes_and

However, there is no detailed list of which fixed IFC Property value is derived from which parameter of the element (which could also be different for different element types).

Re: IFC. Factory default mapping rules.

GOBA — Sun, 28 Jun 2020 17:49:48 GMT

Thanks Laszlo! It would have been nice to have that detailed list