/// <summary>
/// Determines whether this product is an re-issuance.
/// </summary>
/// <returns>System.Boolean.</returns>
public bool IsReissuance() => Designator != null && Designator.StartsWith("RR");
/// <summary>
/// Determines whether this product is a correction.
/// </summary>
/// <returns>System.Boolean.</returns>
public bool IsCorrection() => Designator != null && (Designator.StartsWith("CC") || Designator.StartsWith("AA"));