public Header ToVefa()
{
PeppolDocumentTypeId documentTypeId = PeppolDocumentTypeId.ValueOf(this.DocumentTypeIdentifier.Identifier);
return(Header.Of(
this.SenderId,
this.RecipientId,
this.ProfileTypeIdentifier,
this.DocumentTypeIdentifier,
this.InstanceId == null ? InstanceIdentifier.GenerateUuid() : this.InstanceId.ToVefa(),
InstanceType.Of(
documentTypeId.RootNameSpace,
documentTypeId.LocalName,
documentTypeId.Version),
this.CreationDateAndTime
));
}
