simple-5----Page:36
1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48 

Issue F: What does document apply to
Problem
Current document makes transformations conditioned on tuple type
Two layer conditions ugly
Henning proposed policy documents apply to tuples
Data Model Implication
Policy documents apply to processing of presence document
Can condition policy document on existence of specific service, device or their characteristics
Can specify transformations that apply to specific service, device, presentity
Proposal
Punt per-tuple privacy
PPT Version