[xacml] on postconditions

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Subject: [xacml] on postconditions




From: Simon Godik <>
To: "''" <>
Date: Mon, 14 Jan 2002 11:00:31 -0800






Title: on postconditions





Post-condition is executed after the rule fires and does not affect grant/deny 
outcome of the rule.


With this definition we can not predict which poscondition(s) will be executed for a given
authorization request. This is not desirable.


One way to make post-conditions predictable is to associate post condition not with a rule
but with the outcome of grant or deny, eg:
on_grant do_something
on_deny do_something


That means every time any subject is granted (or denied) action on any resource all post-conditions
listed in on_grant (or on_deny) will be predictably executed.


on_grant and on_deny post-conditions could be associated with specific action, subject, resource
triplet, meaning that given post-condition will be executed every time subject is granted or denied
permission to access resource.
on_grant(action, subject, resource) do_something;
on_deny(action, subject, resource) do_something;


Simon Godik









Follow-Ups:

Re: [xacml] on postconditions
From: bill parducci <>
Re: [xacml] on postconditions
From: John Erickson <>








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