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   Are elements allowed to nest within themselves?

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  • From: "Richard L. Goerwitz III" <richard@goon.stg.brown.edu>
  • To: xml-dev@ic.ac.uk
  • Date: Wed, 9 Sep 1998 20:27:02 -0400

Just for future reference, this sort of question is easily
answered by a validator.  E.g., go to


and paste in a brief document like the one you posted be-
fore (with a few bits of sugar to make it taste good to
the validator):

<!DOCTYPE foo [
<!ELEMENT foo ( foo*, bar* )>

<!-- top-level "foo" element -->
     <!-- first nested "foo" element -->
     <foo answer="yes">
          <bar>this one</bar>
          <bar>that one</bar>
     <!-- second nested "foo" element -->
     <foo answer="no">
          <bar>the other one</bar>
     <!-- third nested "foo" element (empty) -->

Richard Goerwitz
Brown University

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