UML22 — p269-p270 Constraint

[2] The type and ordering of the result output pin are the same as the type and ordering of the open association end.
let openend : AssociationEnd = self.endData->select(ed | ed.value->size() = 0)>asSequence()>first().end in

"AssociationEnd" -> "Propertye"

[3] The multiplicity of the open association end must be compatible with the multiplicity of the result output pin.
270 UML Superstructure Specification, v2.2
let openend : AssociationEnd = self.endData->select(ed | ed.value->size() = 0)>asSequence()>first().end in

"AssociationEnd" -> "Propertye"

[4] The open end must be navigable.
let openend : AssociationEnd = self.endData->select(ed | ed.value->size() = 0)>asSequence()>first().end in

"AssociationEnd" -> "Propertye"

[5] Visibility of the open end must allow access to the object performing the action.
let host : Classifier = self.context in
let openend : AssociationEnd = self.endData->select(ed | ed.value->size() = 0)>asSequence()>first().end in

"AssociationEnd" -> "Propertye"

See issue 6462 (resolved in UML 2.3) for disposition