# req-017

As a user, I want to know that:

- My buckets represent my real categories of spending, like beer and holidays;
- My pipes represent how much I want to come in and out of each bucket;
- Each real transaction I make may be associated with at most one bucket;
- Buckets have a balance, which represents the amount of money I intend to be
  free to spend in the real category of spending which that bucket represents;

so that I can have buckets and pipes which express how I want to distribute, and
have previously distributed, my incomings and outgoings.

Source: req-002

Requires: dml-bucket, dml-pipe, dml-transaction, req-095