One edge of an imported CAD Body, chosen by picking it in the viewport. Its Curve property gives the edge as a curve you can wire on.
Which edge: a reference into a CAD Body's edges. Pick an edge in the viewport to create one.
Values the block gives besides its output. The editor lists them under Properties, and an input can read one by reference.
The axis-aligned extent of the edge's polyline.
The curve the edge runs along, as its polyline.
This edge in a list of one, like every value that has a list type.
The body that contains this edge.