[%- USE money = format(l('$%.2f'));
    USE date;
    USE CGI = CGI_utf8;
    USE POSIX;
    SET DATE_FORMAT = l('%m/%d/%Y');

    # Don't wrap in l() here; do that where this format string is actually used.
    SET HUMAN_NAME_FORMAT = '[_1] [_2] [_3] [_4] [_5]';

    # x and y are artifacts of using <input type="image" /> tags instead of
    # true submit buttons, and their values are never used. page is used, but
    # currently none of the use cases for rendering the query_string back
    # into page output call for propagating the value of the page variable.

    query_string = CGI.query_string |
        replace(';x=\d+','') | replace(';y=\d+','') | replace(';page=\d*', '') |
        replace(';', '&') | replace('&', '&amp;');

    propagator = '?' _ query_string;

    is_advanced = CGI.param("_adv").size;
    is_special = CGI.param("_special").size;

    # -----------------------------------------------------------------------------
    # mkurl()
    #
    # Current page, updated params:
    # mkurl('', {foo => 'bar', boo => 'baz'});
    #
    # New page, one param is a list:
    # mkurl('http://flarg.baz/squz', {foo => 'bar', boo => ['baz', 'faz']});
    #
    # New page, clear all existing params before applying new ones:
    # mkurl('/fuz/buster', {foo => 'bar', boo => 'baz'}, 1); 
    #
    # Current page, clear the 'some_param' from the existing params:
    # mkurl('', {foo => 'bar', boo => 'baz'}, ['some_param']);
    MACRO mkurl(page, params, clear_params) BLOCK;

        # clone the query string to avoid clobberation
        cgi = CGI.new(CGI.query_string);

        # remove requested params
        IF clear_params.0; # array
            FOR p IN clear_params; cgi.delete(p); END;
        ELSIF clear_params;
            cgi.delete_all();
        END;

        # always remove these pesky artifacts
        cgi.delete('x', 'y'); 

        # apply user params
        FOR k IN params.keys;
            foo = cgi.param("-name", k, "-values", params.$k); 
        END;

        # for url brevity, remove any params that have no value
        FOR p IN cgi.param;
            val = cgi.param(p);
            IF val == ''; cgi.delete(p); END;
        END;

        IF page;
            page _ '?' _ cgi.query_string;
        ELSE;
            cgi.url("-path" => 1, "-query" => 1);
        END;
    END;
%]