"Extract Filename from Process Documents to use in Join"

I have a folder of documents where the filename of each is needed to "join" the text contents with another dataset. Is it possible to extract the filename, remove the extension and add it to the results in some way so I can associate the 2nd dataset with the contents of the file

At the moment I'm using the process documents from folder operator but I'm not sure how to get from there to where I want to go