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Here are the Network class methods to add and delete arcs between nodes:

Java:

Network.addArc

Network.deleteArc

Python:

Network.add_arc

Network.delete_arc

R:

Network$addArc

Network$deleteArc

C#:

Network.AddArc

Network.DeleteArc

The graph defined by nodes and arcs in a Network class instance a directed acyclic graph (DAG) at all times. An attempt to add an arc which would create a cycle in the graph will cause an exception.

To inspect the graph structure, you can use the following methods:

Java:

Network.getParents

Network.getParentIds

Network.getChildren

Network.getChildIds

Python:

Network.get_parents

Network.get_parent_ids

Network.get_children

Network.get_child_ids

R:

Network$getParents

Network$getParentIds

Network$getChildren

Network$getChildIds

C#:

Network.GetParents

Network.GetParentIds

Network.GetChildren

Network.GetChildIds

The methods with the "Ids" suffix return the arrays of string identifiers of the related nodes, otherwise the arrays of integer node handles are used.