#' Data
#'
-#' Data encapsulation as a list (days) of lists (components).
+#' Data encapsulation, in the form of a few lists (time-series + exogenous variables).
#'
#' The private field .tv is a list where each cell contains the hourly variables for a
#' period of time of 24 hours, from 1am to next midnight. The other lists contain