The maps data set library that is referenced by both
the MAPS and the MAPSSAS librefs have a data set named METAMAPS, which
contains metadata about all of the data sets that are delivered in
the library.
MEMNAME is just one of the variables that you will find among the
metadata in MAPS.METAMAPS and MAPSSAS.METAMAPS:
identifies the name
of the variable in the data set, where x is
a numerical value.
describes VAR
x in
the data set.
identifies the names
of all of the data sets that are delivered in the MAPS or MAPSSAS
library.