I was looking for an easier way to build the FHIR Query String, given the Record Map request that is passed into the DTL.

I built this Function, but when I run a message through it, my Query String that is passed back into the DTL is a Reference Pointer and not the String I am looking for. 

ClassMethod BuildFHIRQueryString(record As %String, Output queryString As %String) As %Status

{

    // Assuming 'record' is a string containing the record map data

    // Define the delimiters

    Set fieldDelimiter = "|"

    Set repeatDelimiter = "~"

   

    set queryString = ""



    // Split the record into fields

    Set fields = $LISTFROMSTRING(record, fieldDelimiter)

   

    // Iterate over each field

    For i=1:1:$LISTLENGTH(fields) {

        Set field = $LISTGET(fields, i)

        if ($LENGTH(i)>0)

        {

          if ($LENGTH($Get(queryString)) > 0)

          {

            set queryString = queryString_"&"_field_"="_$Get(i)

          }

          else

          {

            set queryString = field_"="_$Get(i)

          }

        }

    }

    $$$TRACE(queryString)

    return queryString

    Quit $$$OK

}

Within a DTL how I get the entire Raw Record Map String that includes the | Seperators? is it something like... 

##class(Ens.MessageHeader).%OpenId($$$JobSessionId) 

 Thanks

Scott