Pure curiosity as I couldn't find any subject on the matter... It is listed as a feature here: PI AF Roadmap
The PI System Directory will capture and provide an inventory of installed OSIsoft server software - such as PI Data Archive, AF, Analytics, Notifications, Interfaces, Connectors, PI Web API and PI Vision in a customer's environment. It will be used as a basis for providing PI System Health and KST management to customers in versions of the PI System beyond 2017 R2.
Fun fact: this tool will be released around Christmas... It does sound like a long-awaited gift, not the kind that changes a life, but one that makes it better.
Retrieving data ...