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The "Absorption Choice" only appears when you have used the "Extension Manager" to turn on the "Relational View".
The "DerivationRule" is now called "DerivationNote". (Changed because the "rule" feature does not yet generate code so its only a note)
If you enter a ...
OK, thank you.
I've read the relevant pages of NORMA Lab tutorials, but unfortunately they aren't very helpful for me, since they keep referring to properties that don't exist in my NORMA version (just installed the very latest VS2010 edition a few minutes ago). For example, in this case it refers to the property ...
This natural object role modeling architecture extension for vs10 is currently accessible form the context of a class library project when i use
< project > | add | new item | visual c# items | general | object-role modeling file & object-role modeling (db import). Since this
extension is about creating and maintaining model ...
Regarding non-exclusive subtypes and role subtypes, these reflect the differences between subtyping in ORM2 and in typical O-O languages. I've managed to use Ruby's flexiblity to get something very close to multiple inheritance in a language that doesn't support it. In some cases non-exclusive subtyping can be handled through ...
Regarding the relational database schema, by default NORMA absorbs functional fact types played by subtypes back into the supertype (in this case, Language). You can arrange for the mapping to generate separate tables for the subtypes by changing the absorption choice to "separate" (e.g. see the section on Subtype mapping Options in ...
I am able to get automatic definitions of classes in simple model in C#. However, so far I have had less luck when using subtypes in my models. For example, suppose I have the following simple model of different kinds of languages:
Now, if I open the "ORM Generator Selection" window, select ...
This is really a question for Matt, but I think I know the answer. Not all ORM2 constraints are yet rendered into SQL. This type of constraint seems to be one of those that are missed.
On another note, if you add a hyphen in the parking expense reading "Employee claims parking- Expense", you get better verbalisation: For each ...
Thank you for your answer.
I create model like yours but I don't have same result. This is what I get.
Lets asume that I get same result.
Verbalisation of ExclusionConstraint is:
For each Employee, at most one of the following holds:
that Employee is allocated some ParkingSpace;
that Employee claims ...
One other statement, in your last sentence, needs comment. Here is your last sentence again:
"Without knowing the data type, you might have a conceptual model that can be interpreted given some external context (meaning the model will have an affinity to the culture it was entered in), but you do not have a model that can be ...