Archived on 09/02/2026 no longer running at https://playground.dev.urbanobservatory.ac.uk
This is a proof of concept demonstration for mixing JSON-LD and JSON Hyper-Schema for different purposes, within the Urban Observatory standards.
You'll need a recent version of NodeJS that understands ES6 syntax, and a modern browser that understands async/await among other things.
npm install
npm start
By default, it will launch a server listening on port 8080 and using http://localhost:8080 as the base. You can set
the PORT and BASE environment variables to override these.