To relate 2 or three parameters (e.g. stage height to discharge) lookup tables are used. This can be used also to describe level-area curves for off-line storage areas To relate 2 or three parameters (e.g. stage height to discharge) lookup tables are used. This can be used also to describe level-area curves for off-line storage areas use this field as a notebook to add comments, suggestions description of data entered etc. Number of rows Number of columns start date and time from which the relation is valid. end date and time until which the relation is valid. If not present the relation is assumed to be valid indefinitely type of extrapolation if outside the range: non = not allowed, critical stop maxmin = stays fixed at max (or) min level in table linear = linear extrapolation The type attribute determines how the data is interpreted: double, long or string. The total number of items MUST match rows*cols. Items are processes from top left to bottom right, row by row