All core/built-in functions. These functions are available to any custom rule. They are generic and can operate
against any JSON Path configured.
Checks that one or another property is set, but not both.
Checks an element has NOT been defined.
Checks the length of a value meets a minimum or maximum length.
Checks an element has been defined.
Checks value is using the correct case.
Checks enum values match supplied values.
Check values against regular expressions.
Checks that an object matches a supplied JSON Schema.
Checks values in an array are alphabetically ordered.
Checks that a property has been defined or exists.