winkr7
1. Nodes and links could be placed at layout editor already, it used links with overlapping test to get the two connected nodes. See the basic capx. Designer also could put the UID of two connected nodes on private variables of links at layout editor.
2. Yes, each link could have 3 connection types
1) Node A -> Node B
2) Node A <- Node B
3) Node A <-> Node B
I use 3) in my sample capx. See the "action: add edge".