I recently implemented cost constraints, and a question came up: If the
mode is "ordinal", what do constraints mean?
First possibility: The constraints apply to the ordinal numbers. Eg, "lt
3" means "only give me the lowest 2". That would make sense if ordinals
are always 1, 2, 3, etc. But they're not; they can be any value.
Second choice: Constraints apply to the underlying numeric costs, and then
the server ordinalizes the src/dest pairs that satisfy the constraints.
That makes sense, except a client could use that to determine the
underlying numeric costs, which I assume some servers would like to keep
hidden.
Number 3: Say that constraints only apply when you ask for numeric costs.
- Bill Roome
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