  It is often recommended that identifiers for ontology terms should be
semantics-free or meaningless. In practice, ontology developers tend to use
numeric identifiers, starting at 1 and working upwards. In this paper we
present a critique of current ontology semantics-free identifiers;
monotonically increasing numbers have a number of significant usability flaws
which make them unsuitable as a default option, and we present a series of
alternatives. We have provide an implementation of these alternatives which can
be freely combined.
