pan class="identifier">cartesian</span><span class="special">&gt;</span> <span class="identifier">point_t</span><span class="special">;</span>
    <span class="keyword">typedef</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">linestring</span><span class="special">&lt;</span><span class="identifier">point_t</span><span class="special">&gt;</span> <span class="identifier">linestring_t</span><sp