From: http://www.ietf.org/internet-drafts/draft-koponen-sms-xml-01.txt
Date: 2001-06-11
See: http://xml.coverpages.org/xml-sms.html

XML encoding for SMS messages

Appendix B. Full DTD of the messages


   <!ELEMENT message ((submit*   | deliver* |
                       ack* | deliverystatus* |
                       statusreportrequest* |
                       delete*  | deletereport*),
                       to?,  from?)>
   <!ATTLIST message cid %ATEXT #IMPLIED>
   <!ATTLIST message id  %ATEXT #IMPLIED>


   <!ELEMENT submit (da+, oa?, ud?, udh?, dcs?, pid, vp?, timing?, rsr?
                     qos?, cost?)>

   <!ELEMENT da ((number|group|email), (atype? | shadow))>

   <!ELEMENT number (#PCDATA)>

   <!ELEMENT group (#PCDATA)>
   <!ATTLIST group type (number|email) "text">

   <!ELEMENT email (#PCDATA)>

   <!ELEMENT atype (#PCDATA)>

   <!ELEMENT shadow EMPTY>

   <!ELEMENT oa ((number|email), atype?)>

   <!ELEMENT ud (#PCDATA)>
   <!ATTLIST ud type (binary|text|unicode) "text">

   <!ELEMENT udh (#PCDATA)>

   <!ELEMENT dcs (#PCDATA)>

   <!ELEMENT pid (#PCDATA)>

   <!ELEMENT vp (delay)>
   <!ATTLIST vp type (absolute|relative) #REQUIRED>

   <!ELEMENT timing (at | delay)>

   <!ELEMENT at (year,month,day,hour,minute,second,timezone)>

   <!ELEMENT year (#PCDATA)>
   <!ELEMENT month (#PCDATA)>
   <!ELEMENT day (#PCDATA)>


Koponen, et. al.        Expires October 17, 2001               [Page 31]

Internet-Draft       XML encoding for SMS messages            April 2001


   <!ELEMENT hour (#PCDATA)>
   <!ELEMENT minute (#PCDATA)>
   <!ELEMENT second (#PCDATA)>
   <!ELEMENT timezone (#PCDATA)>

   <!ELEMENT delay (year?,month?,day?,hour?,minute?,second?)>

   <!ELEMENT qos (#PCDATA)>

   <!ELEMENT cost (#PCDATA)>

   <!ELEMENT rsr EMPTY>


   <!ELEMENT deliver (oa, da?, ud?, udh?, dcs?, pid?, scts?,
                      location?, qos?)>

   <!ELEMENT scts (#PCDATA)>

   <!ELEMENT location (#PCDATA)>

   <!ELEMENT deliverystatus (said+, from?)>

   <!ELEMENT said (#PCDATA)>
   <!ATTLIST said ds (delivered|delivery failed|expired|delayed|cancelled)>
   <!ATTLIST said acks (sent|unsent)>

   <!ELEMENT statusreportrequest EMPTY>

   <!ELEMENT delete (da*)>

   <!ELEMENT deletereport (deleteok, deletenotok)>

   <!ELEMENT deleteok (da*)>
   <!ELEMENT deletenotok (da*)>

   <!ELEMENT ack (said+,from)>
   <!ATTLIST ack status (in_progress|ok|error>

   <!ELEMENT to (#PCDATA)>

   <!ELEMENT from (#PCDATA)>