Requirement: component like a tag but for 'namespace'

[stephen.green@systml.co.uk]

Apologies it is such a late stage (and maybe too late for guidelines so maybe something for adjunct document):
I feel there is need for another component (optional but possibly important) in a TA: something like a namespace to create a TA package. I suggest it is an upper level of grouping.
Rationale: when TAs are otherwise atomic and possibly self-contained, there needs to be a way to associate TAs with a group, like tagging but a bit more authoritative. It is a special kind of tag which is the same in function as a namespace in XML/code and a package in modeling/code but as with XML namespaces it can confer authority in that the authors can reserve use of the namespace to their own work, say. Whether it would include a version id is a special discussion as there may be special problems with this like those in XML where there may be a need to add TAs and/or introduce a new version without having to use a new namespace. Maybe it is a type of tag particularly relevant to a header.

If it isn't to be added as a TA component, maybe it could be added as metadata to the TA(s) - not to be confused with test metadata of course.

Again, apologies for the lateness.