SYSML21 — Use Case 7.25.1 incorrect link

Section 7.25.1 Use Cases has a reference to 7.13 but it should probably be 7.16

A use case is typically specified as a sequence of interactions between the subject and the various actors, which are all modeled as part usages. Each interaction can be modeled as a message (see 7.13 ) that delivers some payload or signal from an actor to the system or vice versa. The sources and target ends of these messages can either be modeled simply as abstract events within the lifetime of the subject and actor occurrences (see 7.9 ), or more concretely as actions performed to carry out the interaction (see 7.17 ).

The reference to "message" points to 7.13 but that is the section on "Connections". This is doubly wrong since messages generally pass over "Interfaces" which is section 7.14. However, this is probably meant to reference section 7.16 for "Flows and Messages"