Dear Christian-Emil,
Yes, this is the solution. Of course you may argue, that it is more indirect.
P107 is both, individual member and subgroup membership. So, there is a subgroup
membership. My question, you may express the problem with "very artificial", is
actually
what the ontological nature, the substance of the roles are. If they are
positions,
personae, they would be not so much relations between an Individual and the
Group, but a
structure of the Group, and would be better expressed by specializations of
Groups and
their parts. If we regard them as relational, they are better expressed by
subproperties
or 107.1 . If we keep 107.1, and regard nevertheless the model of singleton
Groups as valid,
then, p107.1 would represent shortcuts over singleton Groups.
Opinions?
Martin
[email protected] wrote:
Dear all
First of all it is difficult to comment a solution which is not presented
but just referred to. I assume that this unknown suggested solution is as
follows:
Assume a master and an apprentice: An actor can be the only member of a
singleton group. The relationship master.-apprentice can be expressed as a
group having the master-singleton and the apprentice-singleton as members.
The type of the singleton-group can express the relation the members have
in the master-apprentice group. If this is the solution it is of course
possible but very artificial like epicycle models of the planet orbits.
I may be blind, but I dont find any sub group property in the model.
Regards,
Christian-Emil
Dear All,
I just received a contribution voting against P107.1 and P144.1,
with the argument that following our definition of Group, it can be also
an office or
position. So, we could model master and apprentice as subgroups - no need
for any extension.
Also, this could consistently describe changing positions.
Comments welcome.
Best,
Martin
--
--------------------------------------------------------------
Dr. Martin Doerr | Vox:+30(2810)391625 |
Principle Researcher | Fax:+30(2810)391638 |
| Email: [email protected] |
|
Center for Cultural Informatics |
Information Systems Laboratory |
Institute of Computer Science |
Foundation for Research and Technology - Hellas (FORTH) |
|
Vassilika Vouton,P.O.Box1385,GR71110 Heraklion,Crete,Greece |
|
Web-site: http://www.ics.forth.gr/isl |
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--------------------------------------------------------------
Dr. Martin Doerr | Vox:+30(2810)391625 |
Principle Researcher | Fax:+30(2810)391638 |
| Email: [email protected] |
|
Center for Cultural Informatics |
Information Systems Laboratory |
Institute of Computer Science |
Foundation for Research and Technology - Hellas (FORTH) |
|
Vassilika Vouton,P.O.Box1385,GR71110 Heraklion,Crete,Greece |
|
Web-site: http://www.ics.forth.gr/isl |
--------------------------------------------------------------
