Combining schemas

[z10...@gmail.com]

Hello,

I have several JSON documents that have very similar structure but differ in some nested JSON objects. I want to create a JSON schema for the common parts of the documents and separate schemas for the varying parts. For example

// schema1.json
{
  "definitions": {
    "field": {
      "id": "field-schema",
      "type": "string"
    }
  },
  "$ref" : "common.json"
}


// schema2.json
{
  "definitions": {
    "field": {
      "id": "field-schema",
      "type": "number"
    }
  },
  "$ref" : "common.json"
}

// common.json
{
  "type" : "object",
  "properties": {
    "field": {
      "$ref": "field-schema" // ERROR: ref not found
    }, ...
  }
}

schema1.json and schema2.json reference the common schema (common.json) and define specific schemas (kind of like template method pattern). The example does not work. Is this implementation dependent? Is there a way to accomplish this without any preprocessing?

[Roy Walmsley]

I can see that your first two definitions have defined "field". "field-schema" is a property within this definition, and not externally directly referenceable. If you want to reference "field-schema" you need to have a separate definition for "field-schema".