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Everything about GDL - Doors/Windows/Objects/Stairs etc. (Example: I created an object that prints an error message in 3D all the time, please help!)

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By Laura Yanoviak
I realize that GDL Object Subtypes are based on IFC entities. Because the "Furnishing" Subtype is hardwired into AC, I've created a copy ("Furnishing_OSL") so I can customize the listing parameters.

Does anyone know if changing the name of a Subtype will affect the IFC functionality?
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By Moonlight
Hi Laura

Sorry it took you so long to receive an answer.

GDL Library Parts are govern by an inertial serial number "GUID" that is composed of 2 parts, the first part tells ArchiCAD what GDL subtype should it reference the new Library Part.

In simple english words for GDL novice: When ArchiCAD reads the object serial number, it will know what type of object it is (ex: door, window, furniture, etc), for more info read GDL guides and manuals

In your case, I guess you have created a new subtype from one that was already available with ArchiCAD, if that was true, then the new subtype that you have created will have a new GUID, but that GUID will reference it parent object, therefore nothing bad will happen.