Demo - The specification is a demo of MERT. For a full list of available versions, see the Directory of published versions

MERT Required Definition

An element marked as MERT Required indicates that the element SHALL be present in a conformant resource instance.

MERT Required is enforced through:

• Cardinality constraints (e.g., 1..1)
• Fixed values
• Invariants

If an element is marked MERT Required:

• A Sender SHALL include the element in the resource.
• A Receiver SHALL reject instances that do not conform to required structural constraints, unless operating in a documented tolerance or reconciliation mode.

MERT Required defines structural conformance.