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XMLIST is a hack to do a "background" refresh of the database maintained
by the MLIST program (rather than to add a MACRO-20 interface to the
QUASAR facility similar to the one written for PASCAL-20 at Rutgers
University). The batch job submitted by XMLIST creates a "lock file" to
prevent simultaneous access to the MLIST database during a "refresh",
and deletes the lock file when the refresh is complete.
For a complete up-to-date release of the PASCAL-20 interface to QUASAR,
please contact Rutgers University. A portion of the PASCAL-20 QUASAR
interface facility is included here only to be able to build XMLIST from