file

Open:
poem (po pro, txt, rtf)
dictionary (po pro, princeton)
phonetica (popro, others?)
form (po pro)

Save As:
poem (po pro, txt, rtf, html, xml)
dictionary (po pro, princeton, xml)
phonetica (po pro, xml, others?)
form (po pro, xml)

All users can open & save poems, ordinary users can't open or save anything else.