...
- Can set have repeating items?
- Do we need to have repeating items?
- Use Case: A professor creates a reading list which includes a work early in the semester and then repeats it later in the semester.
(Paolo) I apologize that should have been a co:Set. For Bags you need to have an instance of Item to support for repeated elements. Once you flatten down to co:element the repeated items become one. The idea of the co:element (defined as chain) in general is to provide a shortcut to the elements. In that case we are interested in finding the existence (one of them), the repetitions are irrelevant at that level.
Example 4-ore: A Virtual Collection as an unordered collection of items using ORE Ontology's Aggregation with multiple unordered items
...