IFClite TypeScript API
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    Type Alias FailureReasonCode

    FailureReasonCode:
        | "absent"
        | "mismatch"
        | "notNumeric"
        | "cardinality"
        | "duplicate"
        | "aggregate"
        | "notDate"

    Closed set of failure reasons for the generalised report (PR 3 onward emits the set-check kinds).