How to compare attributes in different entities?

Hello

I would compare/check that a number of attributes in an entity is identical to another set of attributes in another entity. The attribute type is text.
How is the best way to do this?

Thank you!

/ Robert

Hi Robert,.

The easiest way is to use the ExistsScope function.
So, for example, imagine two sets of features, "employee" and "personnel file" (there may be several cases of employees and in many cases staff records). Suppose that two of these entities are global (i.e. they have no direct relationship between them).

I'm not sure why you want to compare the two, so here are a few examples of things to do, and you can apply depending on what is most relevant for you.

First of all, you can write a Boolean value which essentially confirms if an employee has a folder:

the employee has a personal best if:
.. ExistsScope (personnel records)
.. .the employee name = the name of the recording of personnel
... Home office employee of .the = the registration of personnel office

It's just a simple Boolean which will confirm that there is at least one instance of personal record that matches his name & Office at home. If that's what you have to do is by far the easiest way to achieve this in the OPA. Here's a useful article that goes into details: http://docs.oracle.com/html/E27987_01/Content/Reference/Rule%20function%20examples/Entity_and_relationship_functions.htm

Often, however, it is useful to "corresponds to an instance of entity to another" and then run rules on the instance of "corresponding"...
For example, once the personal file of the employee has been identified, it can be useful to run than some of the more detailed rules. You can create a relationship suspected between the employee and the recording of personnel and call it "personal employee record.

For example:

personal best is a member of the personnel file of the employee if:
.. employee name = the name of the recording of personnel
.. The employee's Home Office = the registration of personnel office

Then once you have this relationship, you can then later use this rules:

the employee must be encouraged if
.. ForScope (personal record of the employee)
... of personal .the record rating > 80

This is particularly useful if you have a large number of instances. The comparison will be only once to create the relationship deducted and not whenever you want to reason about "staff of the employee record.

More info on alleged here relationships:
http://docs.Oracle.com/HTML/E27987_01/content/rules%20using%20entity%20instances/Write_rules_infer_relationships_entities.htm

I hope this helps, after back if you have further questions.
See you soon,.
Ben

Tags: Oracle Applications

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