I was wondering if it was possible to specify that an attribute should be “unique” in a MySQL sense of the word. Meaning that for a given concept, there should not be two entities sharing the same attribute value. It’s typical for IDs.
For instance, my model is:
track sub entity,
If I enter twice the following insert query:
insert $1234 isa track has track-id 1234;
I did not find any example in this way in the documentation.