An associative connector indicates an association between symbols.
A causal connector indicates that the source symbol is the cause or the origin of the target symbol. Causal connectors are the main operators in actors, wherein the modal response on the right is triggered by the context on the left.
Indicates that the symbol on the left is delegating contextual control to the symbol on the right. Used to show, for example, delegation from a user facing interface to a service.
An inference connector indicates that the target symbol may be inferred from the origin symbol. Inference connectors are the main operators in inferences, where the context elements on the right are inferred from the data on the left.