Proposed changes:

CU UAFX IFunctionalEntity InputData
TC 003: Verify that at least one Variable is exposed in the InputData folder or a subfolder.
TC 004: Verify that InputData references only variable nodes, instances of InputFolderType or SubscriberCapabilitiesType.

CU UAFX IFunctionalEntity OutputData
TC 003: Verify that at least one Variable is exposed in the OutputData folder or a subfolder.
TC 004: Verify that OutputData references only variable nodes, instances of OutputFolderType or PublisherCapabilitiesType.

Detailed test procedures can be found here:

https://opcfoundation.sharepoint.com/:x:/r/FLC-WG/Work/@Sub-Groups/Test_Development_WG/Draft%20Specifications/IFunctionalEntity_TestCases_V4.xlsm?d=w9fb03a98667847109d1c833512bca40b&csf=1&web=1&e=pva5uV