A new edition of the Seminar of Polish University Knowledge Bases is held Mar 22-24, 2023 and euroCRIS is present on the event programme again this year. A presentation on "Recent advances in CRIS interoperability" is to be delivered by the euroCRIS Technical Secretary on Fri Mar 24th. The talk will address the progress around CRIS interoperability taken place since last year's event including the launch of the NatResPort WG and recent developments in the area of PIDs.