json schema. How to make a reference to another property?

Question

JavaScript

Hello. I read a little about json schema d4 and a question arose. Is it possible using only (json schema) to validate an object with keys a and b (both numeric) and the condition that b is greater than a? Something like

{
  a: {
    type: 'number',
    maximum: 'value of b'
  },
  b: {
    type: 'number'
  }
}

Answer 1

What does this have to do with the schema? This is data validation.