a>
            </li>
</ul></div>
<h6>
<a name="geometry.reference.concepts.concept_linestring.h2"></a>
          <span class="phrase"><a name="geometry.reference.concepts.concept_linestring.rules"></a></span><a class="link" href="concept_linestring.html#geometry.reference.concepts.concept_linestring.rules">Rules</a>
        </h6>
<p>
          Besides the Concepts, which are checks on compile-time, there are rules
          that valid linestrings must fulfill. Most algorithms work on any linestring,
       