Compile Error on For All Of Rule

Question

Here is the rule:
The Family Unit is valid if
For All of the Application’s Family Members, the Family Member’s Country of Citizenship = “US”.
the Application is a singleton entity. the Family Member is a non-singleton entity. A relationship exists between the two from Application to Family Member (1:M) of the Application's Family Members.
the Family Member’s Country of Citizenship is defined as a variable thrugh the document.
When compiling, the error message states it is expecting a relationship belonging to entity: global
I thought that creating a singleton entity makes it equivalent to the global.
Thanks,
Terry

Answer 1

I would second Jasmine's recommendation and add that everything you want to do can be achieved by ensuring the relationships with the correct cardinality ie 1:1.
However, its important to add that whenever you see a 1:1 relationship, you have to ask yourself if you wouldn't be better off with a single entity instead of two. There are of course valid reasons for having separate entities, such as matching customer data, but you should always consider simplifying the model.
1:1 relationships can be simply traversed using the For or ForScope operator (see my other answers to your queries).
You can use the for operator to lift attributes across a to 1 relationship (often very useful)
eg:
The application’s end date = For(the application’s promotion, the promotion’s end date)You can use the for operator to compare attributes across a to 1 relationship
eg:
The application's processing fee is valid if
   For(the application’s promotion, The application’s processing fee > The promotion’s processing fee)You can use the scoped for operator to do more complex operations
The application's processing fee is valid if
  For(the application’s promotion)
    The application’s processing fee > The promotion’s processing fee; and
    The promotion's code = the application's codeEdited by: frank.hampshire on Oct 15, 2010 9:52 AM
Edited by: frank.hampshire on Oct 15, 2010 9:52 AM