When creating a cross object store search in Search Designer that filters by document class, the software expects the document class to exist in all the object stores against which you are searching. When the search executes, the software looks for all the document class filters in all the object stores specified for the search, using aliasing to resolve equivalent classes.
To assign an alias ID to a class:
Example of aliasing properties and filtering by document class
In this example, you have two object stores, OS1 and OS2. Both object stores have a functionally equivalent property called SSN.
Object store OS1 has a class, Data1, and object store OS2 has a class called Data2. The SSN property was added to each class.
To create a search in the Search Designer that retrieves documents from both object stores where the SSN number is the same, filtering by Data1 and Data2:
Documents with the class Data1 in OS1 and Data2 in OS2 where SSN equals the specified value are returned.