XQuery Quantified Expressions

Existential and Universal quantifiers

Find titles of books in which both sailing and windsurfing are mentioned in the same paragraph.

	for $b in //book 
	  where some $p in $b//para satisfies 
		 contains($p, "sailing") and contains($p, "windsurfing") 
	  return $b/title
   

Find titles of books in which sailing is mentioned in every paragraph.

	for $b in //book 
	  where every $p in $b//para satisfies 
		contains($p, "sailing") 
	  return $b/title