Source : Webster's Revised Unabridged Dictionary (1913)

Canonicity \Can`on*ic"i*ty\, n. [Cf. F. canonicit['e].]
   The state or quality of being canonical; agreement with the
   canon.

Source : Free On-Line Dictionary of Computing

canonicity
     
         The extent to which something is {canonical}.
     
        (1995-03-03)