diff --git a/doc/src/sgml/lo.sgml b/doc/src/sgml/lo.sgml
new file mode 100644
index 3d56ba3..0c11fdc
*** a/doc/src/sgml/lo.sgml
--- b/doc/src/sgml/lo.sgml
*************** CREATE TRIGGER t_raster BEFORE UPDATE OR
*** 76,82 ****
    <para>
     For each column that will contain unique references to large objects,
     create a <literal>BEFORE UPDATE OR DELETE</> trigger, and give the column
!    name as the sole trigger argument.  If you need multiple <type>lo</>
     columns in the same table, create a separate trigger for each one,
     remembering to give a different name to each trigger on the same table.
    </para>
--- 76,90 ----
    <para>
     For each column that will contain unique references to large objects,
     create a <literal>BEFORE UPDATE OR DELETE</> trigger, and give the column
!    name as the sole trigger argument.  You can also restrict the trigger
!    to only execute on updates to the column with:
! 
! <programlisting>
! CREATE TRIGGER t_raster BEFORE UPDATE OF raster OR DELETE ON image
!     FOR EACH ROW EXECUTE PROCEDURE lo_manage(raster);
! </programlisting>
! 
!    If you need multiple <type>lo</>
     columns in the same table, create a separate trigger for each one,
     remembering to give a different name to each trigger on the same table.
    </para>