use of ifc_subtype

[Alex Moruzzi]

Hi,
I read in GDL Reference guide that the ifc subtype can be set in the scripts ... Questions are where, how and what is the result of an instruction like :
ifc_subtype 51

Any help will be welcome.

Thanks

[Alex Moruzzi]

I could answer some of it by myself...
The use of ifc_subtype is related to MEP modeling and will be used by IFC add-ons while conversion...
By stating the "ifc_subtype=51" in the gdl script, the information will be supplied to ifc document that the object is an "IfcOutletType"...
What I would have expected by stating an ifc_subtype in the GDL script is :
- find some pset values to match the subtype
- have anything making this statement visible wether in IFC type or else...

Someone could help in understanding the real need of such definition ?

Thanks