<!-- triple-s.dtd                                                     -->
<!-- Standalone XML version 1.1                                       -->
<!-- June 2001                                                       -->
<!-- ===========================================================      -->
<!-- An XML definition for moving surveys between packages            -->
<!-- on various hardware and software platforms.                      -->
<!-- ===========================================================      -->
<!-- This DTD has been produced by the triple-s group                 -->
<!-- (Keith Hughes, Steve Jenkins and Geoff Wright).                  -->
<!-- For further information on the triple-s group visit              -->
<!-- the web site at http://www.triple-s.org.                         -->
<!-- ===========================================================      -->
<!-- Public identifier:                                               -->
<!--   -//triple-s//DTD Survey Interchange v1.1//EN                   -->
<!-- Public URL:                                                      -->
<!--   http://www.triple-s.org/dtd/sss_v11.dtd                        -->
<!-- ===========================================================      -->
<!--                                                                  -->
<!-- Version history:                                                 -->
<!--                                                                  -->
<!--   1.0             Original non-XML triple-s standard             -->
<!--   1.1   Feb 2000  XML version based on non-XML 1.1 standard      -->
<!--   1.1a  Apr 2001  type attribute (variable element) lower case   -->
<!--                   code attribute (value element) REQUIRED        -->
<!---                  size element definition moved within DTD       -->
<!--   1.1b  Jun 2001  added formatted texts (with break element)     -->
<!--                     for title, label and value elements          -->
<!--                                                                  -->
<!-- ===========================================================      -->
<!--                                                                  -->
<!--          BEGINNING OF ACTUAL DOCUMENT TYPE DEFINITION            -->
<!--                                                                  -->

<!--temporary parameter entities                                      -->
<!ENTITY % vartype "single |
                    multiple |
                    quantity |
                    character |
                    logical" >

<!-- formatted text with breaks element and entity                    -->
<!ELEMENT br EMPTY>
<!ENTITY % formatted_text "(#PCDATA | br)*" >

<!-- TOP LEVEL                                                        -->
<!-- =========                                                        -->
<!--                                                                  -->
<!ELEMENT sss (date?, time?, origin?, user?, survey)>
<!ATTLIST sss version CDATA #REQUIRED
              options CDATA #IMPLIED>

<!-- DOCUMENT DESCRIPTION                                             -->
<!-- ====================                                             -->
<!--                                                                  -->
    <!ELEMENT date (#PCDATA)>

    <!ELEMENT time (#PCDATA)>

    <!ELEMENT origin (#PCDATA)>

    <!ELEMENT user (#PCDATA)>

<!--                                                                  -->
<!-- SURVEY DESCRIPTION                                               -->
<!-- ==================                                               -->
<!--                                                                  -->
    <!ELEMENT survey (title?, record)>

       <!ELEMENT title %formatted_text;>

<!--                                                                  -->
<!-- RECORD DESCRIPTION                                               -->
<!-- ==================                                               -->
<!--                                                                  -->
        <!ELEMENT record (variable+)>
        <!ATTLIST record ident CDATA #REQUIRED>

<!--                                                                  -->
<!-- VARIABLE DESCRIPTION                                             -->
<!-- ====================                                             -->
<!--                                                                  -->
            <!ELEMENT variable (name, label, position,
                    ((spread?, values) | size)?)>
            <!ATTLIST variable ident CDATA #REQUIRED
                               type (%vartype;) #REQUIRED>

                <!ELEMENT name (#PCDATA)>

                <!ELEMENT label %formatted_text;>

                <!ELEMENT position EMPTY>
                <!ATTLIST position start CDATA #REQUIRED
                                   finish CDATA #IMPLIED>

                <!ELEMENT spread EMPTY>
                <!ATTLIST spread subfields CDATA #REQUIRED
                                 width CDATA #IMPLIED>

                <!ELEMENT size (#PCDATA)>

<!--                                                                  -->
<!-- VALUES DESCRIPTION                                               -->
<!-- ==================                                               -->
<!--                                                                  -->

                <!ELEMENT values (value+ | (range, value*))>

                    <!ELEMENT value %formatted_text;>
                    <!ATTLIST value code CDATA #REQUIRED>

                    <!ELEMENT range EMPTY>
                    <!ATTLIST range from CDATA #REQUIRED
                                    to CDATA #REQUIRED>

<!--                                                                  -->
<!-- END OF DOCUMENT TYPE DEFINITION                                  -->