Hi, Please find attached draft v4 of the NSI AA document. I tried to keep it as concise as possible. It is a major rewrite of the draft v2 that was implemented earlier this year in OpenNSA, Autobahn, Safnari and possibly others. I believe that the main concepts are backwards compatible, but the implementation details will most likely change a bit. A couple of weeks ago I sent a slide pack with the renewed concepts to a subset of this group but did not receive much feedback. I hope that sending it to the whole group will elicit some more reactions. Things that still need to be done are: * description of additional schemas used to add security attributes to NSI message + examples (I will need some help from an expert here) * more and/or better use cases (please all help) * a final review by a native speaker Cheers, HansT.