Right, but what about the existing operators --- what is a more correct way to document them?
Ouch.
Appealing to J.F. Allen's terminology ("An Interval-Based Representation of Temporal Knowledge", Comm ACM 26(11) 832-43), overleft could be called "left or finishes" (implying all other related conditions, of which there are a bunch) but this relies too heavily on time notation I think. "right boundary left of right boundary" is accurate but rather verbose, "rightoverleft" too confusing. Of course, I suspect most people will see the operator, not the C function name; if they see the latter they can read the code anyway.
Perhaps document as S &< T iff S "does not extend to the right of/beyond" (the right boundary of) T? And either leave the C functions as-is or give them reasonable names; in either case, "a.high.x <= b.high.x" is just as clear as any comment.
-- Bill
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