libopc/third_party/libxml2-2.7.7/test/relaxng/tutor7_3.rng

<element name="path" xmlns="http://relaxng.org/ns/structure/1.0"
         datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
  <list>
    <oneOrMore>
      <data type="double"/>
      <data type="double"/>
    </oneOrMore>
  </list>
</element>