title: How to Add Custom Json Schema Validators
body: <p>We are using the <a href="https://github.com/networknt/json-schema-validator" rel="nofollow noreferrer">light4j json schema validator</a> in our project.<br>
  Version <code>1.0.36</code>  </p>
  
  <p>Is it possible to add custom validators like ISO8601 time/duration min and max for example? If so how do you add custom validation?    </p>
  
  <p>We realize these would not be part of the json schema standard, but we're just using it to validate our configuration json internally. </p>