source: examples/python_tests/alumni3_rt1/README @ 20eaefe

#
# This example shows an example of reasoning about a role's parameters with
# range constraints.  There are 6 principals StateU, Bob, Mark, Maryann, 
# Joe, and Jan.  StateU wants to establish a set of founding alum 
# based on the year of graduation.  On graduation each alum has previously 
# been issued a credential parameterized with their major and graduation year.
# StateU sets up a policy that says that  a principal is a founding alumni
# if they graduated in 1960, 1961, or 1963 in either mathematics or psychology
# only.  One assumes there was some kind of NCAA suspension in 1962.  This 
# policy is expressed in Credential 1.
#
# Credentials 2, 3, 4, 5, and 6 each assign a diploma credential to Bob (a 1961
# mathematics degree), Mark (a 1965 mathematics degree), Joe (a 1961 zoology degree),
# Maryann (a 1962 psychology degree), and Jan (a 1960 psychology degree)
#
# The query.py asks if each of these principals are favored alums, and only 
# Bob and Jan are.

# alumni3_rt1

# Credential 1
# [keyid:stateU].role:foundingAlumni 
#              <- [keyid:stateU].role:diploma([string:?D:['mathmatics','psychology']],
#                                        [integer:?Year:[1960,1961,1963]])

# Credential 2
# [keyid:stateU].role:diploma([string:'mathmatics'],[integer:1961]) <- [keyid:bob]

# Credential 3
# [keyid:stateU].role:diploma([string:'mathmatics'],[integer:1965]) <- [keyid:mark]

# Credential 4
# [keyid:stateU].role:diploma([string:'zoology'],[integer:1961]) <- [keyid:joe]

# Credential 5
# [keyid:stateU].role:diploma([string:'psychology'],[integer:1962]) <- [keyid:maryann]

# Credential 6
# [keyid:stateU].role:diploma([string:'psychology'],[integer:1960]) <- [keyid:jan]