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Frequency constraint on a Unary predicate   Message List  
Reply | Forward Message #1428 of 1447 |
RE: [JCM] Frequency constraint on a Unary predicate

There is already an implicit frequency constraint of "exactly one" on any unary predicate, i.e., there's already an implicit functional uniqueness constraint on the role, and the tool is apparently set up to prevent making that constraint explicit. But you can use the "add constraints" dialog to add the uniqueness constraint explicitly.
 
Andy
 
-----Original Message-----
From: geverest@... [mailto:geverest@...]
Sent: Monday, August 02, 2004 1:27 AM
To: jcm@yahoogroups.com
Subject: [JCM] Frequency constraint on a Unary predicate





I am using VisioEA 2003 and am attempting to define a frequency constraint
on a unary predicate.
I want to specify exactly one.  When I leave the minimum at 1, and change
the maximum from 2 to 1,
the system dims out the 'OK' button and I am unable to define that
particular frequency constraint.
This would appear to be a bug in the system.  Anyone encountered this?
-gord.everest



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Mon Aug 2, 2004 3:32 pm

andy_carver
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I am using VisioEA 2003 and am attempting to define a frequency constraint on a unary predicate. I want to specify exactly one. When I leave the minimum at 1,...
geverest@...
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Aug 2, 2004
2:46 pm

Hi Gordon, ... That is because if every instance of a given object is supposed to participate in a role and can participate in that role at most one time, then...
Scot Becker
scotabecker
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Aug 2, 2004
3:37 pm

There is already an implicit frequency constraint of "exactly one" on any unary predicate, i.e., there's already an implicit functional uniqueness constraint...
Andy Carver
andy_carver
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Aug 2, 2004
4:02 pm

From: Andy Carver [mailto:andy.carver@...] Sent: Monday, August 02, 2004 10:33 AM To: jcm@yahoogroups.com Subject: RE: [JCM] Frequency constraint on...
Patrick Hallock
pathallock
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Aug 3, 2004
2:56 pm

Hi Gordon, I see now what you were trying to do, sorry I didn't get you before. One way to do this would be to make the fact type a 1:1 binary, optional to...
Andy Carver
andy_carver
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Aug 3, 2004
4:02 pm
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