Very interesting: That will turn out to be complicated, I usually name the pdf with
shortform of journal is not yet ( but I could adapt to ) the shorttitle without spaces, first author is minuscule and the title as copied from the website or jabref. Since I am not very good with reg expressions, I use them only sparely for general replacement in oo, could you provide a regex that I can test it.
In the title ? mark are omitted, : are replaced with __, and / are replaced with =, ?/: not allowed in file names.