IfcBoxAlignment should be enumeration

[I-Sokolov]

want to share here buildingSMART/IFC4.3.x-output#621

[aothms]

This was reported several times #544 #584

I assume it has to do with backwards compatibility concerns in STEP. Like first using a freeform text field and later migrating to CSS. And us trying to be compatible again with STEP.

I think everybody agrees, but given compatibility constraints I guess it's unlikely it will get adapted.

We have something similar in RasterFormat https://ifc43-docs.standards.buildingsmart.org/IFC/RELEASE/IFC4x3/HTML/lexical/IfcBlobTexture.htm But probably there it is intentional.

For future reference we need to understand our compatibility policy with respect to adding an ENUM item vs changing a WR literal. This is a bit too subjective now. CC @TLiebich @berlotti

[TLiebich]

@aothms - the main reason back then was to follow STEP parts, if we adopted definitions from there. I don't think, that this reason is still relevant - more the question of compatibility among IFC-Versions.

[Moult]

Closing as duplicate #544.