XPath Question

 If anyone can help me by answering this,  I would really appreciate it !

  Given a dtd that specifies

  <!ELEMENT use-case ( name,  use-case-list?, scenario-list ) >
  <!ELEMENT scenario-list (scenario)* >
  <!ELEMENT name (#PCDATA) >
  <!ELEMENT scenario (name) >
  <!ELEMENT use-case-list (use-case)* >

  What is the XPATH expression that specifies  return the node- set of
use-case whose child scenario-list has no child elements ?


  Alan Beale


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