Hello, list.

I have a problem on an aplication I'm trying to migrate to CouchDB: I have a
series of documents like:

{
  type: "Period",
  start: "2009-10-12",
  end: "2009-12-12"
}

Problem is, I need to check on my application if there is a valid period. I
need to search if:

(start < today) and (today < end)

How can I do this in CouchDB? I've tried creating views, but I'm stuck (I'm
emitting [doc.start, doc.end] as an index, but I still cannot find a way to
search this).

Thanks in advance,
Mauricio.