A cross-party Scottish Parliament committee has asked ministers to clarify the consultation on Scotland's constitutional future.
Committee MSPs will discuss the independence plan timetable
Holyrood's European and external committee is to hold an inquiry into the "national conversation" white paper, launched last month.
It wants clarification over a timetable and intended progress.
The paper has set out the case for options, including more Holyrood powers and a ballot on independence.
Committee convener Jackie Baillie said of the request: "Once we have received that response, the committee will be better able to scope the nature of the inquiry we want to have."
The committee also heard a call from independent MSP Margo MacDonald to set out its position on the EU treaty, which she branded a constitution "by any other name".