Explain the di?erent senses in which the objects in an object database can be considered equal.

What will be an ideal response?

1. Two objects can have the same oid, in which case they are the same object.
2. They can have di?erent oids, but both have the same attributes and relationships and the values of these attributes / relationships can be the same for both objects. In this case, we can have two further possibilities when we look deeper at what it means for the results returned by two relationships to be equal. Since these results are objects, they can be equal in the sense (1) or (2), which gives rise to two di?erent notions.