Fields from other Survo data sets can be used as input information in VAR transformations. Other data sets to be employed in VAR must be given as a specification INDATA=<data_1>,<data_2>,... where <data_1>,<data_2>,... are Survo data sets of any type. Number of them is limited to 12. A field in <data_i> is denoted by Di:<fieldname>, i=1,2,... Also lags and leads can be indicated in brackets []. Example: VAR Change=Price-D1:Price TO DAT87 / INDATA=DAT86 computes 'Change' to data DAT87 as a difference of 'Price' in DAT87 and DAT86. M = Matrix files in VAR operation V = More information on VAR operation