Who Am I? Why? Identity is the root of many challenges that arise during system usage troubleshooting, especially in situation where fine-grained attribute-based access controls are in use. Thus, it imperative that you (the identity principal) possess knowledge about how to you are being identified to a Virtuoso instance. Basically, this is about Virtuoso's equivalent of the "whoami" command on Unix and Linux. What? How to determine your Virtuoso SQL session identity, following a successful login. How? SQL through, for instance, iSQL: SELECT get_user(); SPASQL (SPARQL-in-SQL) through, for instance, iSQL: SPARQL SELECT bif:get_user() {}; SPARQL through, for instance, the /sparql input form: SELECT bif:get_user() {} Related Virtuoso Tips and Tricks Collection