*** a/doc/src/sgml/intarray.sgml
--- b/doc/src/sgml/intarray.sgml
***************
*** 239,245 ****
     <literal>gist__int_ops</> (used by default) is suitable for
     small and medium-size arrays, while
     <literal>gist__intbig_ops</> uses a larger signature and is more
!    suitable for indexing large arrays.
    </para>

    <para>
--- 239,247 ----
     <literal>gist__int_ops</> (used by default) is suitable for
     small and medium-size arrays, while
     <literal>gist__intbig_ops</> uses a larger signature and is more
!    suitable for indexing high-cardinality data sets - where there
!    are a large number of unique elements across all rows being
!    indexed.
    </para>

    <para>