[xacml] [policy model]: Subject semantics proposal

I post a proposal of subject semantics.

>Action Items:
>2. Submit subject semantics proposals.

(See attached file: XACMLSubjectSemantics.pdf)

regards,
Michiharu Kudo
Internet Technology              TEL +81-46-215-4642
Tokyo Research Laboratory    FAX +81-46-273-7428
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