On Fri Oct 7 21:44:20 2011, Matthew Wild wrote:
Erm, maybe. Am I right that:
Let me do two things:
1) Assume that the catalogues consist of the label "SECRET" only,
aside from the empty label.
2) Spell catalogue correctly. Honestly, these Americans...
Scenario 1:
- Empty item in catalog
- Restrict true
Client may use Empty or SECRET, only.
Scenario 2:
- Empty item in catalog
- Restrict false
Client may use Empty or SECRET - or any other label, should it know
of some.
Scenario 3:
- No empty item in catalog
- Restrict false
Client may use SECRET - or any other label, should it know of some -
or the empty label.
Scenario 4:
- No empty item in catalogue
- Restrict true
Client may use SECRET - or the empty label.
all ultimately mean the same thing to the client?
No - adding an empty label does provide a selector for it, but a
client may always send no label.
However, client may not always send *other* labels. (How they'd
discover them is not within the scope of XEP-0258, but they could be
policy aware and have access to the directory containing clearance
information, perhaps.)
Dave.
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