What is the use of the key date in filters in IP?

Hi all,

can anybody tell me what the key date on the filter in the planning modeler is good for? It seems to be always overwritten by either the key date in the query or the one set for the infocube in the planning modeler. Even if I don't set a key date for the latter two, the infocube date seems to be taken (I get the current day as query key date).

Or to put it this way: Where do I set my key date when I try to use time-dependent navigation attributes in a planning query? The infocube key date seems to take precedence, but I haven't found a way to derive my key date from the input-ready planning year variable in the query (exit or replacement path won't work).

Regards,

Tilman