|Definition:||A way to indicate directional or non-directional flow|
|Rendered as:||Arrows pointing in the direction of flow|
To define a tag to indicate when a waterway has no dominant flow direction.
By convention the direction of the way should be downstream (ie draw the way in the direction that the water flows), when known. This leads to a problem where there is no way to indicate that a waterway does not have a direction of flow.
Suggested rendering is arrows in the direction of flow if directional, no arrows if not.