I need all of the names and recipies of the professions. I tried to gether them from wowhead.com, but I realised, that it isn't so simple. Thatswhy I would require some ideas, what oportunities I have? I've already seen the Blizzard api, but it didn't show me the recipies of the professions.
LibPeriodicTable-3.1 has sets for the various professions, filled by a data crawler for wowhead.
These only list ids, so you'll have to look up the names yourself.
The quality of the data depends on wowhead's quality so it's not always 100% accurate :/