The EQL range filter functionality allows a user, at request time,
to specify either a literal value or a geocode value to limit the records
returned for the query.
The remaining refinement dimension values for
the records in the result set are also returned. The literal value expressions
are called basic range queries and the geocode value expressions are geospatial
range queries.
Note: Do not confuse EQL range filters with the range filters implemented
by the
Nf parameter. Although both types of range filters are
similar in nature, EQL range filters are implemented differently, as described
below.