Can I suggestÂ
Jurisdiction_type_ID_date_nickname
Such as
AU_Reg_12345_20161212_VotingProcedures.pdf
Then a database of correlates, where the same thing is under multiple jurisdictions. Manage the vocabularies for jurisdictions and types.
Allow extensions by letting people make up jurisdictions, types and IDs by prefixing them with X, a la IETF.
This allows sorting by ID better, and if people dont know the nickname they can wildcard it. I think putting the formal title in the filename is asking for trouble.
Rick