Hi to you all. Once again, I find it necessary to reiterate - it is imperative that we separate the semantics of an ORM or Ontological model from its...
geverest@...
Apr 1, 2001 1:47 pm
651
All, Thinking along Gordon's ideas: I like to think of ORM as a specifcation. A specification that is very complete and precise. In that, we can choose to view...
Patrick Hallock
path@...
Apr 1, 2001 6:15 pm
652
Can you say that again, but without using a presentation (or syntax)? ... From: geverest@... [SMTP:geverest@...] Sent: Sunday, April 01, 2001...
Kelly VanDusen
logic@...
Apr 2, 2001 6:14 pm
653
... that we ... presentation ... George, Your response seems quite passionate, and we seem to be in violent agreement. I understand you to agree that ORM is...
mark.j.allred@...
Apr 2, 2001 6:14 pm
654
Hello, due to distance, it seems me to be out of seminars. What are other way of formation? Web sites, texts? Alain....
Alain.Fernandez
alain.fernandez@...
Apr 2, 2001 8:13 pm
655
RE: [JCM] Re: ORM as an ontology languageHi Alain, Check out "Information Modeling and Relational Databases: From Conceptual Analysis to Logical Design" by...
Scot A. Becker
scotb@...
Apr 2, 2001 8:18 pm
656
Dear JCM Subscribers: We'd like to offer the following correction/retraction: "We regret to inform you that we were in error with regards to our April 1st,...
Scot A. Becker
scotb@...
Apr 2, 2001 9:38 pm
657
I think the crew at InConcept deserve a Nobel prize for Humor! Can't wait for next year's announcement. Terry ... From: Scot A. Becker...
Terry Halpin
TerryHa@...
Apr 3, 2001 12:25 am
658
In building a Dictionary from ORM: build starts, warnings appear without errors, and mapping starts. Then, "Build canceled by user" appears and the process...
mark.j.allred@...
Apr 4, 2001 12:26 am
659
In my experience this is an indication of unrecoverable corruption of the IMD. If you have an older version of the IMD you may be able to restore it and...
John Miller
jMiller@...
Apr 4, 2001 1:31 pm
660
Yes, several of my students have encountered this problem with the 25 Mb download of VM. In all cases, as best we have been able to determine, the problem...
geverest@...
Apr 4, 2001 1:31 pm
661
What version of Infomodeler/Visiomodeler are you using? I used to see the "build cancelled by user" problem quite a bit in older versions, but haven't run...
Bill MacLean
bmaclean@...
Apr 4, 2001 6:32 pm
662
I'd like to propose a change to ORM metamodel as posted on JCM website <<VisioModeler conceptual (ORM) model.url>> The changes are to eliminate the Object...
John Miller
jMiller@...
Apr 5, 2001 2:23 am
663
In the ORM Meta-model there is a distinction between a predicate and a relationship. Relationships have arity, predicates have predicate text. In the tools...
John Miller
jMiller@...
Apr 5, 2001 5:50 pm
664
Hi John W.r.t. the metamodel I originally drafted, we need to retain ObjectType as a supertype of EntityType and ValueType. Also the unary predicate "is...
Terry Halpin
TerryHa@...
Apr 5, 2001 9:19 pm
665
I missed the "EntityType nests Relationship" fact, however why is it "Entity Type" and not "Nested Entity Type"? Doesn't the current model allow an "Unnested...
John Miller
jMiller@...
Apr 5, 2001 11:37 pm
666
Hi John You make two points, one about nesting and one about independence. Let's consider these in turn. The nests relationship is used to define...
Terry Halpin
TerryHa@...
Apr 6, 2001 12:41 am
667
Hi, Is there anyone on this list who is in the UK? I'm trying to find some other local users of ORM / Infomodeler. thanks Giles Collingwood...
Giles Collingwood
g.collingwood@...
Apr 6, 2001 1:37 pm
668
Terry, Is there an inconsistency in the meta model? 'EntityType nests Relationship' and 'EACH NestedEntityType IS AN EntityType THAT nests SOME Relationship' ...
ian_j_wells@...
Apr 6, 2001 1:38 pm
669
Hi Ian Thanks for your comments. the "inconsistency" you point out is not a logical inconsistency, just a difference in the way I chose to model the two...
Terry Halpin
TerryHa@...
Apr 6, 2001 5:24 pm
670
I just tried to reverse engineer the Northwind database from MS SQL server into Visiomodeler, and got a complete mess. During the extraction, I kept getting...
Bill MacLean
bmaclean@...
Apr 7, 2001 2:10 pm
671
Terry, Thanks for clarifying my question, as you point out there is no inconsistency here. I notice that the same approach has been taken with 'ObjectType is a...
ian_j_wells@...
Apr 7, 2001 2:11 pm
672
InConcept Announces the Release of the April Issue of the JCM April 7, 2001 – InConcept today announced the release of the April issue of the Journal of...
Scot A. Becker
scotb@...
Apr 8, 2001 2:44 am
673
Hello all, I am an absolute newbie in ORM (started VisioModeler for the first time yesterday!), but with a few years of experience in entity/relationship and ...
Tanase, Gabriel (CAP,...
gabriel.tanase@...
Apr 9, 2001 3:08 pm
674
I'm going to set aside the joint-account until I understand it better. As far as world customer, I have these thoughts about your discussion: You seem to be...
Don E Tonner
don.tonner@...
Apr 9, 2001 5:17 pm
675
Hi Ian Some versions of ORM don't allow value types to be subtypes, but our version does allow it. For example, you might have a value type "Surname" and add...
Terry Halpin
TerryHa@...
Apr 9, 2001 5:17 pm
676
... but ... When was "allow value types to be subtypes" introduced into "our version" of ORM? Scanning, I find no mention of it in Conceptual Schema, 2 ed....
mark.j.allred@...
Apr 9, 2001 7:56 pm
677
I just checked, and our latest tool still doesn't allow value subtypes. I'll look into whether we can change this to a warning rather than an error. In the...
Terry Halpin
TerryHa@...
Apr 9, 2001 10:04 pm
678
This notion of value object types is one of the most confusing of the constructs in ORM. My students really get hung up on this one. After I present it in...
geverest@...
Apr 10, 2001 1:45 pm
679
Bottom line: don't do it. All this discussion of identifiers and the problems associated with it stem from still thinking in relational or ER terms of...
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