***** File PATHTABL.TXT                                                       
                                                                              
                                                                              
                                                                              
     The PATHTABL.* files document the full volume and subdirectory           
specification for each datafile on this disc.  The table itself (PATHTABL.IDX)
is a delimited table, with fields for filename, extension and version number, 
date and time of observation, volume name, five subdirectory levels, and the  
full path.                                                                    
                                                                              
     The version number is in a separate (numeric) field.  Some CD-ROM drivers
(such as the Microsoft Extensions under MS-DOS) ignore the version number when
accessing the disc.  Others (e.g., Unix) append the version number as a       
required part of the file name.  In any event, the version number is coded on 
the disc, and is so documented in the path table.  Its value is always "1" on 
these discs.