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Schema Validation

Source file: examples/schema_object_validation.hen

What It Demonstrates​

  • collection-local declarations
  • nested schema declarations
  • built-in scalar checks such as UUID, EMAIL, URI, and DATE_TIME
  • schema assertions with ===

Key Pattern​

schema Author {
  id: UUID
  name: string
  email: EMAIL
  avatar: URI
}

schema Article {
  slug: string
  title: string
  subtitle?: string
  image: URI
  author: Author
  content: string
  dateCreated: DATE_TIME
}

^ & body === Article

Run It​

hen verify ./examples/schema_object_validation.hen
hen run ./examples/schema_object_validation.hen 0 --non-interactive

What To Notice​

  • The declarations live in the collection preamble before the first ---.
  • The assertion stays concise even when the object shape is nested.
  • Use the schema examples together with the scalar and root-array examples in examples/ when you need deeper coverage.

Related reference: Schemas