If I request CoordinateSystems by Station along Corridor Featurelines, I will receive a list of those where the XAxis and YAxis are pointing towards the next one in the list. But the ZAxis vector is always normal (0,0,1).
If I import the Featureline as PolyCurve in Dynamo and request the CoordinateSystems along it, the ZAxis is perpendicular to the PolyCurve, as expected.
Why is it that the ZAxis is not rotated? It should be a valuable value for the normal when placing blocks that needs a Z rotation as well. Any Autodesk developer who can explain the reason why it is designed like this?