One Question about ApplyXapth

[Wei Cheng <We...@baylor.edu>]

Hi All,
      When I change the ApplyXpath's argumnets to the following:
      foo.xml /doc/name[@first="David"]
      It don't give the proper answer.
      select all name children of the context node that have a
      type attribute with a value "David"
      also, I changed foo.xml a little to foo1.xml as following:
<?xml version="1.0"?>
<doc>
  <name>
    <firstname> David </firstname>
    <lastname> Marston</lastname>
  </name>
  <name>
    <firstname> David </firstname>
    <lastname> Bertoni </lastname>
  </name>
  <name>
    <firstname> Donald  </firstname>
    <lastname> Leslie </lastname>
  </name>
   <name>
    <firstname> Emily  </firstname>
    <lastname> Farmer </lastname>
  </name>
   <name>
    <firstname> Jack  </firstname>
    <lastname> Donohue</lastname>
  </name>
   <name>
    <firstname> Myriam  </firstname>
    <lastname> Midy</lastname>
  </name>
   <name>
    <firstname> Paul </firstname>
    <lastname> Dick</lastname>
  </name>
   <name>
    <firstname> Robert </firstname>
    <lastname> Weir</lastname>
  </name>
  <name>
    <firstname> Scott </firstname>
    <lastname> Boag</lastname>
  </name>
   <name>
    <firstname> Shane </firstname>
    <lastname> Curcuru</lastname>
  </name>
</doc>      
    When I apply       foo.xml /doc/name[firstname="David"]
    I still can't get the right answer.
    I use this syntax from w3.org,
    another question, in the documention of w3.org/TR/XPath
    17's page, there is a NOTE :
    says not($x!="foo")
    I had a similar idea to apply this to check whether the xml
    document satisfy the foreign key.
    I created another foo2.xml
<?xml version="1.0"?>
<doc>
  <person>
    <name>
      <firstname> David </firstname>
      <lastname> Marston</lastname>
    </name>
    <age> 42 </age>
  </person>    
  <person>
    <name>
      <firstname> Donald  </firstname>
      <lastname> Leslie </lastname>
    </name>
    <age> 40 </age>
  </person>
  <person>
     <name>
       <firstname> Emily  </firstname>
       <lastname> Farmer </lastname>
     </name>
     <age> 30 </age>
  </person> 
  <person>
     <name>
      <firstname> Jack  </firstname>
      <lastname> Donohue</lastname>
     </name>
     <age> 35 </age>
  </person> 
  <person>
    <name>
     <firstname> Myriam  </firstname>
     <lastname> Midy</lastname>
    </name>
     <age> 33 </age>
  </person>
</doc>
  and want to check if name is a foreign key in foo2.xml,
  I want to compare foo2.xml name nodeset with foo1.xml name
  nodeset.
  How can I specify this is xpath?
  my idea is not($name(from foo2.xml)!=$name(from foo1.xml))
  thanks!
Best regards,
 Wei                          mailto:Wei_Cheng@baylor.edu