An identifier assigned to a link is where a link is a topological connection between two nodes. Link-IDs may be arbitrary, or may be assigned by convention to assure that multiple occurrences of the same ID will not occur within one network or within the universe of similar networks or databases. The data flow consists of the following data items each of which is defined in its own DDE:

+ link_type
+ location_identity

Sub Data Flows

Parent Data Flows

Associated PSpecs/Terminators