Every function string uses an output template to instruct the destination database in executing the function for a specific data server.
Function strings for the rs_select and rs_select_with_lock functions use both input templates and output templates, which together perform subscription materialization and dematerialization.
You customize function strings by altering their input and output templates. You customize function strings for functions other than rs_select and rs_select_with_lock by altering only the output template. How you alter a function string depends on the function string’s format-language or RPC.