JSON Schema - Foreign Key (FK) Validation - json

Question

I have the JSON schemas below:
Schema A:
{
"$schema": "http://json-schema.org/draft-04/hyper-schema#",
"title": "A",
"type": "object",
"properties": {
"id": {
"type": "string"
},
"name": {
"type": "string"
},
"entityBId": {
"type": "string"
}
},
"required": [
"name",
"entityBId"
],
"links": [
{
"rel": "B",
"href": "myapi/EntityB?id={entityBId}"
}
]
}
Schema B :
{
"$schema": "http://json-schema.org/draft-04/schema#",
"title": "B",
"type": "object",
"properties": {
"id": {
"type": "string"
},
"name": {
"type": "string"
}
},
"required": [
"name"
]
}
I'm trying to figure out if there is a way to run something like a integrity check based in a JSON Schema with external links/references.
For instance: When I receive an Object A with a entityBId = 1, I'd like to fetch this entity B running a GET in the endpoint declared in the links href and check if there is a valid object from the received id.
It will run like a deep validation and can be useful in a scenario without a defined DB schema.

Answer 1

As suggested by Raj Kamal, I made my own "link validation".
There is a function that looks for link attribute on schemas and validate the externals references directly on database and throw an exception if a valid reference is not found.