[Documentation/entity-facet.md] PredefinedType as USERDEFINED and custom word in ObjectType

[Martin15135215]

https://github.com/buildingSMART/IDS/blob/50f2ceda8ad7df6df312ffdb940e6a72be719552/Documentation/entity-facet.md?plain=1#L13

https://github.com/buildingSMART/IDS/blob/50f2ceda8ad7df6df312ffdb940e6a72be719552/Documentation/entity-facet.md?plain=1#L22

I thought that if you have your own categorisation, you write PredefinedType as USERDEFINED and in ObjectType you put your own designation. The sentences above suggest otherwise.

[Moult]

This is correct. However from the perspective of IDS, it "auto-fetches" the ObjectType if PredefinedType = USERDEFINED.

[Martin15135215]

I see :)

It just confused me when I read the Documentation.

[CBenghi]

There is probably the need to state in the documentation that IDS auto-fetches the ObjectType if PredefinedType = USERDEFINED.

[Moult]

It's a bit unfortunate to write this because this is such an important part of IFC. The only reason we have "USERDEFINED" is because that's what STEP / EXPRESS forces you to do.