I am currently trying to implement an Iterator Pattern to my Library System UML. I have 5 different Repository classes and I want to be able to iterate through all 5 and I am wondering if there is an easier way to show this so that my UML diagram does not start to get to be too confusing.

Below the Iterator Pattern, I have also included other parts of my diagram that didn't fit onto one page. Here is the Iterator Pattern:

Template Method:

Repository Classes for each Database instance:

Title Record +getTitleRecord(): TitleRecord +save() +f fetch()