L.2.14.3.2.1 RTD Supporting Data

/voltypes/volType@type indicates that the supporting information pertains to an RTD function call.
Valid values, as defined by the SpreadsheetML schema, are realTimeData and olapFunctions
/volTypes/volType/main@first indicates the ProgId of the RTD server. This value corresponds to
the first argument of an RTD function in a worksheet.
/volTypes/volType/main/tp contains a listing of topics within the main topic. For the RTD
function, this collection expresses the remaining parameters of the function, and indicate the last known
value and data type of that value.
/volTypes/volType/main/tp@t indicates the data type of the value associated with this topics. For
this RTD example, the value is "aaa: 4447" whose data type is string.
/volTypes/volType/main/tp/v expresses the last known value of this RTD function, "aaa: 4447".
/volTypes/volType/main/tp/stp expresses the remaining topics, or function parameters, for this
RTD function. Notice that in the example, the second parameter is left empty, and the third parameter is
"aaa".
/volTypes/volType/main/tp/tr expresses the cells which are dependent on this particular set of
topics, and which are associated with this supporting information.