In section 17.2.1 InformationFlow (from InformationFlows) page 621, the first constraint states that "The sources and targets of the information flow can only be one of the following kind: Actor, Node, UseCase, Artifact,
Class, Component, Port, Property, Interface, Package, ActivityNode, ActivityPartition and InstanceSpecification except
when its classifier is a relationship (i.e., it represents a link).". Why can't an Activity be the source or target of an InformationFlow, since it is a Behavior as an Use Case?

duplicate, issue closed

Throughout the specification, output parametersets are described as if all (non-optional) output parameters within the set are output. This is not exactly right if the parameterset contains an exception. Please describe how that works and make the document consistent

duplicate of 17927, withdrawn and closed