[slarceSelia]

السلام عليكم و رحمة الله و بركاته

Could knowledgable brothers/sisters please answer the following, or guide me to
some suitable references, preferably online.

1. What are the technical meanings (in the context of fiqh) of the words such as wajib, fardh, sunnah, mandoob, mustahab etc. as used in the Shafi'i madhab?
2. Are the above words used consistently in the various classical fiqh books of the madhab? What I mean is, do different authors use the same word/s to indicate different weightage?
3. Do the significance and meaning of such words differ in other madhabs?

جزاكم الله