Title format: [PDF/JPG tag] Composer's surname, forename - op.xx/xx Title - tags (if known)
e.g. [PDF] Albeniz, Isaac - op.47 Sevilla
or [PDF] Quantz, J. J. - op.02/02 Duetto - Duo (For more than one forename, just give initials.)
or [PDF] Anon. - Packington's Pound (Use Anon. for all anonymous or traditional pieces.) Username may replace Composer's surname and forename for your own compositions.
For Giuliani the opus number should be 3 digits (op.048) and for Bach the BWV number should be 4 digits (BWV 0820).
For more details see instructions here.