Is it possible to view the content of a Business Object?

Summary:

While viewing and editing an transaction model, I came across many Objects to select from, but how do I know what an specific object can do? How do I "open" it to see its content?

Content (required):

Is there a way to view an object content? Because it's very difficult to understand an object without knowing what it specifically does.

As an example: The following image shows an Object called "Supplier Site Location.Site ID". What I can't understand is why do many incidents have different Site IDs if they have the same Supplier Address? In this case, it would be interesting to have a more detailed visualization of the object, for example, this object is analyzing the field "Address" while creating or editing a Supplier.