Queries Regarding JSON and DCN..

Hi guys ,

     Can any one let me know how to create a DCN code to pull the data from ABAP system for an MBO(In SUP )to update the status ,  And Which Environment we need to             use for developing DCN Code as well as JSON.

        What is JSON and how it is related to DCN ?

              what steps we need to follow to complete the whole process like creating DCN Code, JSON content and Passing it to SUP ??

I appreciate your help.

Thanks.