[LFG] position for local discourse function

[Mary Dalrymple]

Does anyone know of a language that has a specifier position where any grammatical function in the clause (but, crucially, not a subordinate clause) can appear, as long as it has a discourse function like TOPIC or FOCUS?   If we assume that information structure roles are represented as TOPIC or FOCUS at f-structure, the relevant specifier node would have an annotation that looks like this, where GF stands for any grammatical function (SUBJ, OBJ, etc.):

(^ TOPIC) = v
(^ GF) = v

That is, the phrase would be an information structure TOPIC, and it would also bear some grammatical function GF in the same clause, but it does not license an unbounded dependency (GF* is not allowed) -- it must bear a grammatical function in the same clause, not a lower clause.

Thanks!

 - Mary