In the buildingSMART documentation, the door swing direction convention for left and right swing is the opposite from e.g. DIN standards.
Blockquote NOTE There are different definitions in various countries on what a left opening or left hung or left swing door is (same for right). Therefore the IFC definition terms may derivate from the local standard and may need to be mapped appropriately.
E.g. according to bSI this is SINGLE_SWING_LEFT
and this is SINGLE_SWING_RIGHT
What is the recommendation? Follow the correct local definition and thus diverge from the bSI specs (e.g. modelling a left swinging door but still apply SINGLE_SWING_LEFT, even though it differs from BSI) or would you introduce a semantic contradiction: model as left swinging yet apply the SINGLE_SWING_RIGHT enumeration to be in line with BSI specs?