snapkey                           Set key variable in snapshot

  in=???                          Input snapshot file name

  out=???                         Output snapshot file name

  times=all                       Range of times to process

  key=???                         Expression for key value

  require=                        List of input items necessary

  produce=Key                     List of output items produced

  passall=true                    If true, pass on input data

  seed=                           Seed for random number generator

  VERSION=2.1                     Josh Barnes  14 May 2008

Joshua E. Barnes      (barnes at
Created: 14 June 2012
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