Relationship between schemas

[salmanff]

I was wondering if you had considered a way to describe relationships between various items in different schemas, linking a key in one to the key in another. (I am new here so apologies in advance if this is a stupid question for whatever reason)... This would male it easier to connect to schemas together - say when the "name" in one schema is the same as the "name" key in another.
Something like this:
"relationship": { "$schema": "https://example.com/referred-to-schema", "field": "keyReferredToInSchema", "type": "strict" }
Thanks

[gregsdennis]

There are a lot of discussions around referencing data located elsewhere (in the instance, or elsewhere in the schema, or something else). Here's an old one: json-schema-org/json-schema-spec#51

Some libraries do support a $data keyword, but it generally isn't implemented in a way that's compatible with JSON Schema. For example

{
  "properties": {
    "foo": {
      "type": "number",
      "minimum": { "$data": "/myMin" }
    }
  }
}

This is supposed to fetch the value for minimum from the instance at /myMin. However, this is an invalid schema because minimum requires a number, but it's been given an object.

I've written an extension spec that is compatible with JSON Schema by shuffling things around a bit. Instead of the above, you use:

{
  "properties": {
    "foo": {
      "type": "number",
      "data": { "minimum": "/myMin" }
    }
  }
}

In this case, data takes an object with keyword property names and references as values. After resolving all of the references, a subschema is produced which is then validated against the current instance.

Currently the only implementation is an extension of my JsonSchema.Net library.

[jdesrosiers]

This doesn't sounds like data reference question. It sounds like they're just talking about schemas.

[salmanff]

Indeed, I am talking about relationships between schemas, but I am not sure how Greg's example gets me there. Can you point to an example of a schema referencing another schema from within the "data" object?
🙏

[gregsdennis]

I misunderstood your question.

Could you edit your original post and provide more detail around the use case for relating schemas outside of the existing $ref keyword? I'm interested in how your proposal would be useful to you.