1  <element name="path" xmlns="http://relaxng.org/ns/structure/1.0"
2           datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
3    <list>
4      <oneOrMore>
5        <data type="double"/>
6        <data type="double"/>
7      </oneOrMore>
8    </list>
9  </element>