Conditional logic in data contracts: Okyline vs JSON Schema

Short summary

Okyline is a JSON validation language where examples become executable schemas, with built-in operators like $appliedIf, $requiredIf, and $forbiddenIf for expressing conditional field logic. Compared to JSON Schema's deeply nested allOf/if/then/else chains, Okyline expresses the same validation rules in 15 lines instead of 70. The tutorial demonstrates variant-based field constraints using a hotel reservation example.

• •Okyline uses example-based validation with conditional operators for field dependencies
• •Produces 75% less code than JSON Schema for equivalent validation logic
• •Clear, readable syntax for payment methods, room variants, and status-dependent fields

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