I am new in Funnelback world. I thought search for PDF only (excluding all web pages and other documents) will be something that is common but I have searched the forum and I think I don't get the keyword right because I couldn't find any discussion or question related to it.
I need to do search
form = JSON and would like to limit my search result only to PDF types. What should I use in my query to filter the result only to PDF files? Thanks.