The conj:reform relation is specific to spoken language and it is used to link elements in a reformulation.
Whereas the relation conj:coord links two different objects, two referents (ex: Mary and John are two different referents).
The relation conj:reform, on the other hand, is used to link two denotations of the same referent (ex: the desert in Kenya, the Kenya desert is denoting the same referent).
The first element contains at least one content word. The second element is a reformulation of the first one : it generally makes more precise the meaning of the first element by the choice of a more specific term or by giving more details.
Reformulation is distinguished on one side from repairs (encoded in the reverse direction by reparandum), where the first element does not contain content words or all its content words are repeated (except for rebuttal, see below), and on the other side, from apposition (conj:appos), when the second element is a new denotation taking another point of view and not a pure reformulation.
We also use conj:reform for a rebuttal, as well as a request of confirmation or a confirmation, when we consider dependencies beyond the speech turn. Such examples, where the second conjunct generally repeats the first one, must not be confused with reparandum: