source: examples/python_tests/acme_rockets_intersection_rt0/README @ 7211a95

mei_rt2mei_rt2_fix_1
Last change on this file since 7211a95 was 7211a95, checked in by Mei <mei@…>, 12 years ago

1) add more python examples
2) add the missing linking role and linking oset api calls
3) fix the output of time typed data term/oset obj in typed_string format

(transform back from yap time format to our ddddddddTdddddd format
  • Property mode set to 100755
File size: 1.2 KB
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1#
2# This example demonstrates intersections.  An intersection is a logical and of
3# roles or osets.  An intersection succeeds if the principal is in the
4# intersection of the sets defined by the roles.
5#
6# The policy set by Acme is that a character must both a preferred customer and
7# a WarnerBrothers character to buy rockets.  Each of those attributes is
8# specified by a role.
9#
10# This example defines 4 principals, Acme, WarnerBrothers, Coyote and Batman.
11# Credential 1 defines the policy requiring both roles to get the buy_rockets
12# role.  Credential 2 gives the Coyote a preferred_customer role.  Credential 3
13# gives Batman the preferred_customer role and Credential 4 recognizes the
14# Coyote as a Warner Brothers character.
15#
16#In order to buy rockets from Acme, you must be BOTH a preferred customer
17#AND a WarnerBros character. In this example, the following query will be
18#successful:
19#
20#    Acme.buy_rockets <-?- Coyote
21#
22#The following query will fail (because Batman does not have the
23#attribute WarnerBros.character):
24#
25#    Acme.buy_rockets <-?- Batman
26#
27# Acme.buy_rockets <- Acme.preferred_customer & WarnerBros.character
28# Acme.preferred_customer <- Coyote
29# Acme.preferred_customer <- Batman
30# WarnerBros.character <- Coyote
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