The DirectionEnum contains - amongst others - the literal 'opposite', but there's no literal to express the original direction. I suppose to add some literal like 'straight', but maybe native speakers have some better expression. Background: A roadClosure can be bothWays, opposite or straight.
I have found one more case where this is a problem. In measurementSiteTable publication we like to define two measurementSiteRecords measuring on the same place, in different directions. Via the measurementSide attribute we thought we could tell the direction but there is not a value in the DirectionEnum to tell the "normal" or "straight" direction. The opposite direction is there..
Implemented resolution defined by Loic