  Most natural language generation systems embody mechanisms for choosing
whether to subsequently refer to an already-introduced entity by means of a
pronoun or a definite noun phrase. Relatively few systems, however, consider
referring to entites by means of one-anaphoric expressions such as
\lingform{the small green one}. This paper looks at what is involved in
generating referring expressions of this type. Consideration of how to fit this
capability into a standard algorithm for referring expression generation leads
us to suggest a revision of some of the assumptions that underlie existing
approaches. We demonstrate the usefulness of our approach to one-anaphora
generation in the context of a simple database interface application, and make
some observations about the impact of this approach on referring expression
generation more generally.
