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(Digel) This keyword would have a numerical value indicating the analysis pass used to classify the events (e.g., Pass 6 or Pass 7.3), and would be used by the Science Tools to avoid mixing FT1 files with different analysis pass values. Like the above, this keyword would be implemented in a reprocessing. Initial thinking had been that this would need to be a new column, but Jim is thinking that having the Science Tools make a consistency check using just a header keyword (e.g., if given a list of input files) would not be difficult. This keyword would be set by makeFT1 and the value to assign would be passed to makeFT1. It would go in the EVENTS extensions of FT1 (and also LS1) files
(JC, 09Jul2010) This keyword will probably have a string value rather than be a number. It will be taken from the xml definition for the event classes.