Anthony Hughes
More than 100 knots by type (bends, bindings, hitches, etc.) with browsable relationships by name (a set of 5 alphabetical ranges A-F, G-L, etc.), use (5 categories), difficulty (3 categories), number of ropes (1-4), and number of steps (1-14 in groups of two). This scheme was based on a knot book and demonstrates a way to handle many attribute values in an attribute set and several different attribute sets.