As you know, there is a lot of vendors for Enterprise Content Management systems (ECM) and they all have different interfaces. Content Management Interoperability Services (CMIS) is a standard for improving interoperability between Enterprise Content Management systems.
At a customer, I received an incident saying that on D2 a document is found by browsing and not found using normal search. The root cause seems to be easy: The Document isn’t indexed?! Not really, you will see it wasn’t easy to find 😉