composite_key_compare</span><span class=special>&lt;</span>
        <span class=identifier>std</span><span class=special>::</span><span class=identifier>less</span><span class=special>&lt;</span><span class=identifier>std</span><span class=special>::</span><span class=identifier>string</span><span class=special>&gt;,</span>   <span class=comment>// family names sorted as by default</span>
        <span class=identifier>std</span><span class=special>::</span><span class=identifier>greater</span><span class=s