[xacml] Proposed resolution to PM-5-17: Boolean Expression of rules

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

Resolution: The <condition> element in a  <rule> can be a boolean
expression of predicates. <rule>s are combined in a
<policyStatement> using a "combiner" algorithm, which specifies
how the results of the <rule>s are combined.  Likewise, <policyStatement>s
and other <policyCombinationStatment>s are combined in a
<policyCombinationStatement> using a "combiner" algorithm, which
specifies how the results of the <policyStatement>s and
<policyCombinationStatement>s are combined.  Some combiner
algorithms may be expressed using boolean expressions, but other
combiner algorithms will use other logic.  A combiner algorithm
MAY be expressed using descriptive text rather than a formal
language or pseudo-code.

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