<!-- Model -->
<element name="road" required="*">
  <attribute name="name" type="string" default="__default__" required="1">
    <description>Name of the road</description>
  </attribute>

  <element name="width" type="double" default="1.0" required="1">
    <description>Width of the road</description>
  </element>

  <element name="point" type="vector3" default="0 0 0" required="+">
    <description>A series of points define the path of the road.</description>
  </element>

</element>
