[J2] group and role hierarchy

["Grinshtein, Artem" <Ar...@t-systems.com>]

Hello All,

IMHO, the term "hierarchical" is not clearly defined in jetspeed.  There is more than one meaning for hierarchical roles/groups according to http://www.doc.ic.ac.uk/~ecl1/papers/rbac99.pdf. 
For example, there're 3 hierarchical roles:
-R1
--R1.1
--R1.2
with persmissions:
grand R1 { permission P1 }
grand R1.1 { permission P2 }
grand R1.2 { permission P3 }

By a generalisation hierarchy ("is a"-hierarchy):
R1 has [P1]
R1 has [P1,P2]
R1 has [P1,P3]

and by a agrregation hierarchy ("part of")
R1 has [P1,P2,P3]
R1 has [P2]
R1 has [P3].

What type of hierarchy will be supported? Does it make any sence to support different types?

Regards,
Artem







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Re: [J2] group and role hierarchy

[David Le Strat <dl...@yahoo.com>]

Artem,

You are absolutely correct.  We need to tackle this,
The current implementation does not do a good job at
this yet. Patches are welcome ;)

I believe that the most common implementation is the
generalization strategy.  This should be the default
in my mind.  Supporting multiple strategies is I
believe a nice to have for now.  Thoughts?

Regards,

David.

--- "Grinshtein, Artem"
<Ar...@t-systems.com> wrote:
> Hello All,
> 
> IMHO, the term "hierarchical" is not clearly defined
> in jetspeed.  There is more than one meaning for
> hierarchical roles/groups according to
> http://www.doc.ic.ac.uk/~ecl1/papers/rbac99.pdf. 
> For example, there're 3 hierarchical roles:
> -R1
> --R1.1
> --R1.2
> with persmissions:
> grand R1 { permission P1 }
> grand R1.1 { permission P2 }
> grand R1.2 { permission P3 }
> 
> By a generalisation hierarchy ("is a"-hierarchy):
> R1 has [P1]
> R1 has [P1,P2]
> R1 has [P1,P3]
> 
> and by a agrregation hierarchy ("part of")
> R1 has [P1,P2,P3]
> R1 has [P2]
> R1 has [P3].
> 
> What type of hierarchy will be supported? Does it
> make any sence to support different types?
> 
> Regards,
> Artem
> 
> 
> 
> 
> 
> 
> 
>
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