Reference object JSON schema for entity in array JSON schema - mule

Question

I am using Anypoint Studio 7.2.3 and Mule runtime 4.1 to write my RAML.
I have a JSON schema for an order object and I also need a JSON schema for a list of order objects. I thought I could reference the order object in the JSON schema for the list of orders to save maintaining the same fields in 2 schemas but I am seeing an error because $schema appears twice and is showing the error when I add a JSON example of an order list in the RAML.
Is it possible to have a separate order object JSON schema that can be referenced by an order list JSON schema?
Order Object JSON Schema (cut down version)
{
"type": "object",
"$schema": "http://json-schema.org/draft-04/schema",
"properties": {
"orderId": {
"type": "string",
"maxLength": 255
},
"comments": {
"type": "string",
"maxLength": 255
}
},
"required": [
"orderId"
]
}
Order List JSON Schema
{
"type": "array",
"$schema": "http://json-schema.org/draft-04/schema",
"properties": {
"$ref": "#Order"
}
}
The below JSON schema works for order list but means I will need to maintain the fields in 2 separate schemas so any change to e.g. orderId will mean I will need to change it in both the order object schema and the order list schema.
{
"type": "array",
"$schema": "http://json-schema.org/draft-04/schema",
"properties": {
"orderId": {
"type": "string",
"maxLength": 255
},
"comments": {
"type": "string",
"maxLength": 255
}
},
"required": [
"orderId"
]
}
Thanks for any help.

Answer 1

Just change "properties" to "items" in your OrderList schema. Also reference the name of the file in the same folder or insert the full path to a file located elsewhere. See the code below:
{
"type": "array",
"$schema": "http://json-schema.org/draft-04/schema",
"items": {
"$ref": "order.schema.json"
}
}
[]'s