CNVRTTMP.RPGLE has no xml or json -

All the documentation I find about web services talks about SOAP and REST and XML & JSON.  Yet the IBM-supplied example CNVRTTMP.RPGLE is just a regular program.  What am I not understanding?

*********************************************************************
     d ConvertTemp     pr
      *****************************************
     d  tempIn                       10    const
     d  tempOut                      10
      *****************************************
     p ConvertTemp     b                   export
      *****************************************
     d  ConvertTemp    pi
     d  tempIn                       10    const
     d  tempOut                      10
      *****************************************
     d tempI           s              8P 2
     d tempO           s              8P 2
     d value           S             50A
      /free
       value = %STR(%ADDR(tempIn));
       tempI=%DEC(value:7:2);
       tempO = (5/9)*(tempI - 32);
       value = %CHAR(tempO);
       tempOut = value;
       %STR(%ADDR(tempOut):10)=tempOut;
      /end-free
     p ConvertTemp     e