Usage of $ref in json schema file - rest

Question

I have a folder named schema having employee.schema file.
In the code snippet below address attribute is an array type.
I want to have address.schema file in the same folder where employee.schema is kept and refer it in employee.schema
Is this possible with draft-03 schema?
{
"type":"object",
"$schema": "http://json-schema.org/draft-03/schema",
"properties":{
"empId":{
"type":"integer",
"required":false
},
"empName":{
"type":"string",
"required":true,
"minLength":10,
"maxLength":20
},
"contactno":{
"type":"string",
"required":true,
"minLength":10,
"maxLength":10
},
"salary":{
"type":"integer",
"required":true
},
"address":{
"type":"array",
"items":{
"type": "object",
"properties": {
"city":{
"type":"string",
"required":true
},
"pincode":{
"type":"string",
"required":true
}
}
}
}
}
}

Answer 1

I think the draft-03 spec says it all:
This attribute defines a URI of a schema that contains the full
representation of this schema. When a validator encounters this
attribute, it SHOULD replace the current schema with the schema
referenced by the value's URI (if known and available) and re-
validate the instance. This URI MAY be relative or absolute, and
relative URIs SHOULD be resolved against the URI of the current
schema.
(https://datatracker.ietf.org/doc/html/draft-zyp-json-schema-03#section-5.28)
Simply define "address" as a "$ref" that points to that other schema.
{
"type": "object",
"$schema": "http://json-schema.org/draft-03/schema",
"properties": {
"empId": {
"type": "integer",
"required": false
},
"empName": {
"type": "string",
"required": true,
"minLength": 10,
"maxLength": 20
},
"contactno": {
"type": "string",
"required": true,
"minLength": 10,
"maxLength": 10
},
"salary": {
"type": "integer",
"required": true
},
"address": {
"$ref": "address.schema"
}
}
}
and then "address.schema" would look like this:
{
"type":"array",
"$schema": "http://json-schema.org/draft-03/schema",
"items": {
"type": "object",
"properties": {
"city": {
"type":"string",
"required":true
},
"pincode": {
"type":"string",
"required":true
}
}
}
}