Dion Moult

IfcCurveStyle.ModelOrDraughting is ambiguous

2

The description is: > Indication whether the length measures provided for the presentation style are model based, or draughting based. Do is True = model based and False = drafting...

Pset_Address should be renamed and should have applicability to IfcActor

4

Currently applicable to IfcBuilding and IfcSite. Propose to add IfcActor so that existing functionality can be maintained. Also propose to rename to Pset_PostalAddress and add Pset_TelecomAddress - both are needed...

Is ParameterTakesPrecedence for IfcWindowType and IfcDoorType still a thing?

2

Originally brought up [here](https://forums.buildingsmart.org/t/using-parametertakesprecedence-in-ifcwindowtype-and-ifcdoortype/2574). I personally have never seen ParameterTakesPrecedence used. In the implementer agreement https://standards.buildingsmart.org/documents/Implementation/IFC_Implementation_Agreements/CV-2x3-181.html it basically states that it should always be false. I propose to mark it...

Proposal to add Pset_LightFixtureTypeCommon.ControlGear

3

Lighting engineers need to nominate the way light fixtures are controlled. Based on some work with a lighting engineer on luminaire schedules I'd propose a new property "ControlGear" with an...

Proposal for IsReinforced to be upgraded to a higher level applicability

3

Right now the IsReinforced property applies to pad footings only. Isn't this property useful for knowing whether slabs, blockwork walls (yes, not just concrete walls), or other elements are reinforced...

Actor assignment concept cannot assign actors to type objects

3

The Actor assignment concept currently describes how to assign actors to objects. This is great, however, more useful than individual objects is type objects. For example, an actor with a...

Standardisation of colour properties

2

A luminaire control register typically contains the colour of the light fitting. I was looking for the appropriate property to put this in and found a lot of colour properties...

Semantic meaning of cardinality of IfcPropertySet association

1

IfcPropertySet.DefinesOccurrence is defined as SET [0:?] OF [IfcRelDefinesByProperties](http://localhost:5000/IFC/RELEASE/IFC4x3/HTML/lexical/IfcRelDefinesByProperties.htm) FOR RelatingPropertyDefinition Scenario 1: IfcWallX IfcPropertySetX IfcSlabX IfcPropertySetX Scenario 2: IfcWallX, IfcSlabX IfcPropertySetX What's the difference between the two scenarios? If SET...

Inconsistency in cardinality of property sets vs material properties

1

This situation is valid for IfcPropertySet: IfcWallX, IfcSlabX IfcPropertySetX I.e. a single property set may be shared by multiple entities. Material properties cannot be shared. IfcMaterial -> IfcMaterialProperties I suspect...

Are there ISO standards (perhaps 10303-41 which I don't have access to, but originally defined organization_role and person_role) which gives better definitions for the types of roles? Right now the...