SYSML21 — AnnotatingMember does not allow visibility

The textual notation production AnnotatingMember in 8.2.2.4.1 Annotations is used in the special syntax for EnumerationBody to allow the bodies of EnumerationDefinitions included AnnotatingElements as members. However, AnnotatingMember does not include the MemberPrefix that allows for visibility to be specified for a normal DefinitionMember. This means that AnnotatingElements in EnumerationBodies cannot currently have any visibility other than public, even though there is no such restriction in the abstract syntax.