WAS/server/rngs/externalImage.rng

<grammar xmlns="http://relaxng.org/ns/structure/1.0" datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
  
  <define name="externalImage">
    <element name="externalImage">
      <element name="url">
        <text/>
      </element>    
      <element name="lang">
        <text/>
      </element>     
    </element>
  </define>
</grammar>