<!ELEMENT wddxPacket (header, data)>
<!ATTLIST wddxPacket version CDATA #FIXED "1.0">
           
<!ELEMENT header (comment?)>
<!ELEMENT comment (#PCDATA)>
<!ELEMENT data (null | boolean | number | dateTime | string | array | struct | recordset | binary)>
<!ELEMENT null EMPTY>
<!ATTLIST null type CDATA #IMPLIED>
<!ELEMENT boolean EMPTY>
<!ATTLIST boolean value (true | false) #REQUIRED type CDATA #IMPLIED>
                                                       
<!ELEMENT string (#PCDATA | char)*>
<!ATTLIST string type CDATA #IMPLIED>
                                                                  
<!ELEMENT char EMPTY>
<!ATTLIST char code CDATA #REQUIRED>
                                                                             
<!ELEMENT number (#PCDATA)>
<!ATTLIST number type CDATA #IMPLIED>
                                                                                        
<!ELEMENT dateTime (#PCDATA)>
<!ATTLIST dateTime type CDATA #IMPLIED>
<!ELEMENT array (null | boolean | number | dateTime | string | array | struct | recordset | binary)*>
<!ATTLIST array length CDATA #REQUIRED type CDATA #IMPLIED>
<!ELEMENT struct (var*)>
<!ATTLIST struct type CDATA #IMPLIED>
<!ELEMENT var (null | boolean | number | dateTime | string | array | struct | recordset | binary)>
<!ATTLIST var name CDATA #REQUIRED>
<!ELEMENT recordset (field*)>
<!ATTLIST recordset rowCount CDATA #REQUIRED
fieldNames CDATA #REQUIRED type CDATA #IMPLIED>
<!ELEMENT field (null | boolean | number | dateTime | string | binary)*>
<!ATTLIST field name CDATA #REQUIRED>
<!ELEMENT binary (#PCDATA)>
<!ATTLIST binary encoding CDATA #FIXED "base64" length CDATA #IMPLIED type CDATA #IMPLIED>