[xacml] Proposed resolution to MI-1-02: Definition of Policy vs. Rule

Based on the March 2002, Face-to-Face, I believe this issue, for
which Carlisle is the champion, is ready to be closed.

Resolution: A "rule" is the smallest unit from which a "policy"
is composed.  A "rule" uses predicates that refer to attributes
and values.

A "policy" is a combination of rules or other policies.  A
combination of rules is called a <policyStatement>.  A
combination of <policyStatement>s or other
<policyCombinationStatement>s is called a
<policyCombinationStatement>.  A policy is the smallest
administrative unit in XACML, and is the smallest unit that can
be signed.  A policy does not refer to attributes and values, but
only to combinations of rules or other policies.

Anne
-- 
Anne H. Anderson             Email: 
Sun Microsystems Laboratories
1 Network Drive,UBUR02-311     Tel: 781/442-0928
Burlington, MA 01803-0902 USA  Fax: 781/442-1692