JSON Structure Technical Deep Dive with Clemens Vasters

In this follow-up episode with Clemens Vasters, Principal Architect for Messaging and Real-Time Intelligence Services at Microsoft, we go deep on the technical details of JSON Structure that didn’t make it into our first conversation. Clemens walks through how metadata and schema serve as the neutral communication layer between publishers and consumers — especially when neither side is human. We dig into the dollar import and dollar ref model, which borrows from package/module conventions to make references explicit, scoped, and self-contained rather than scattered and ambiguous. Clemens explains the extension mechanism using dollar uses, which lets you bolt on extra vocabularies while keeping them expressed in the same language. We also cover the referencing model at scale — why dollar ref is intentionally constrained to the definitions section, how the import extension maps entire documents into namespaces, and how all of this removes the path-resolution headaches that have made JSON Schema difficult to use in large distributed systems. Clemens closes with his philosophy on standardization: build something solid, put it in the IETF so no one worries about a rug pull, and then let adoption happen at its own pace.