Lastly, we should include the $id keyword, which defines a unique URI for our schema. This URI can be used by other schemas to reference our schema, for example, when using our schema as a sub-schema. For now, just set it to a valid URL, preferably using a domain that you control:
"$id": "http://api.hobnob.social/schemas/users/profile.json"
If you don't know how to purchase a domain, we will show you in Chapter 10, Deploying Your Application on a VPS. For now, just use a dummy domain like example.com.
Our finished JSON Schema should look like this:
{ "$schema": "http://json-schema.org/schema#", "$id": "http://api.hobnob.social/schemas/users/profile.json", "title": "User Profile Schema", "description": "For validating ...
