Pentaho Kettle JSON Output

Question

I have to design a KTR, where am passing fields from a step - Select values to JSON Output Step. The output from it is as shown in figure before:

How Can i remove the fields Chart, Title , XAxis, YAxis, series? So that i get only result from this step as outputvalue

My KTR is:

Answer 1

At select values step 4.2.2 select those fields which are required, in your case output field only.

for that press on get fields and delete the fields you mansion.

i am not sure with json thing but it will work as it is applicable for generating or getting result from database.