A {@link Catalog} is a collection of named {@link Command}s (or {@link Chain}s) that can be used retrieve the set of commands that should be performed based on a symbolic identifier. Use of catalogs is optional, but convenient when there are multiple possible chains that can be selected and executed based on environmental conditions.
@author Craig R. McClanahan @version $Revision: 1.7 $ $Date: 2004/11/30 05:52:22 $
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