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Libraries & objects
About Archicad and BIMcloud libraries, their management and migration, objects and other library parts, etc.

IFC entities and subtypes

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?
MacBook Pro Apple M2 Max, 96 GB of RAM
AC27 US (5003) on Mac OS Ventura 13.6.2
Started on AC4.0 in 91/92/93; full-time user since AC8.1 in 2004
1 REPLY 1
Nader Belal
Mentor
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.
A good friend of mine have once told me that I´m so brute that I´m capable of creating a GDL script capable of creating GDLs.