+ HasRotationAngle = getResourceOrNull(graph, URIs.HasRotationAngle);
+ HasRotationAngle_Inverse = getResourceOrNull(graph, URIs.HasRotationAngle_Inverse);
+ HasTurnAngle = getResourceOrNull(graph, URIs.HasTurnAngle);
+ HasTurnAngle_Inverse = getResourceOrNull(graph, URIs.HasTurnAngle_Inverse);