<!ELEMENT Message (Request, Signature)> <!ELEMENT Request ( Fecha, Hora, Ds_SecurePayment, Ds_Amount, Ds_Currency, Ds_Order, Ds_MerchantCode, Ds_Terminal, Ds_Response, Ds_MerchantData?, Ds_Card_Type?, Ds_TransactionType, Ds_ConsumerLanguage, Ds_ErrorCode?, Ds_CardCountry?, Ds_AuthorisationCode? )> <!ATTLIST Request Ds_Version CDATA #REQUIRED> <!ELEMENT Fecha (#PCDATA)> <!ELEMENT Hora (#PCDATA)> <!ELEMENT Ds_SecurePayment (#PCDATA)> <!ELEMENT Ds_Amount (#PCDATA)> <!ELEMENT Ds_Currency (#PCDATA)> <!ELEMENT Ds_Order (#PCDATA)> <!ELEMENT Ds_MerchantCode (#PCDATA)> <!ELEMENT Ds_Terminal (#PCDATA)> <!ELEMENT Ds_Response (#PCDATA)> <!ELEMENT Ds_MerchantData (#PCDATA)> <!ELEMENT Ds_Card_Type (#PCDATA)> <!ELEMENT Ds_TransactionType (#PCDATA)> <!ELEMENT Ds_ConsumerLanguage (#PCDATA)> <!ELEMENT Ds_ErrorCode (#PCDATA)> <!ELEMENT Ds_CardCountry (#PCDATA)> <!ELEMENT Ds_AuthorisationCode (#PCDATA)> <!ELEMENT Signature (#PCDATA)>