Real-time data is covered by JET.Quotes:
JET.Quotes.create() .rics(".SPX") .formattedFields("CF_LAST") .onUpdate(onUpdate) .start();
What would be the equivalent request for fundamental and reference data, please?
E.g. in Eikon for Office terminology, something like TR.Revenue, or to take a parameterized example, TR.TotalReturn(sdate=0D,edate=-1AY).
You may use UDF (cpurl://views.cp./Apps/UDF).
UDF provides a unified front-ent to content from over 50 Thomson Reuters services, such as Top News, fundamentals, and street events, through a common JSON-POST style interface.
There are a lot of services available in UDF. From my test, ADC service can provide the values for TR.Revenue and TR.TotalReturn.