As for the VLO (see https://github.com/clarin-eric/VLO/issues/173), make links that are (based on) PIDs (handles, DOIs, maybe also URNs) but not rendered as such for usability reasons should be 'decorated' with an icon that:
Indicates that the linked resource has a PID
Makes the PID visible somehow, e.g. in a dialogue that allows for copy/paste
Offers (a link to) explanation on what PIDs are and how they can be used
This could be applied in the list of resources in the collection and to the PID for the collection itself.
The icon could for instance just be a little box that says "PID".
A PID information panel similar to the one used in the VLO has been implement and is available since 1.2.0-alpha4 (also deployed on beta-vcr.clarin.eu)
As for the VLO (see https://github.com/clarin-eric/VLO/issues/173), make links that are (based on) PIDs (handles, DOIs, maybe also URNs) but not rendered as such for usability reasons should be 'decorated' with an icon that:
This could be applied in the list of resources in the collection and to the PID for the collection itself.
The icon could for instance just be a little box that says "PID".