@type code() ::
  :invalid_check_digit
  | :invalid_date
  | :missing_ai
  | :forbidden_ai
  | :constraint_ai

Validation error code.

• :invalid_check_digit - AI data field failed with checksum validation.
• :invalid_date - AI date field (YYMMDD) validation failed
• :missing_ai - Required AI missing in Data Structure.
• :forbidden_ai - AI was present in Data Structure that is not allowed in validation context.
• :constraint_ai - AI violates constraint check.

@type t() :: %GS1.ValidationError{ai: String.t(), code: code(), message: String.t()}

Validation error struct.

Fields

• :code - error code (see code/0).
• :ai - Application Identifier (AI) associated with the error.
• :message - user friendly error message.