For each book found in both bib.xml and reviews.xml, list the title of the book and its price from each source.
<books-with-prices>
{
for $b in doc("bib.xml")//book,
$a in doc("reviews.xml")//entry
where $b/title = $a/title
return
<book-with-prices>
{ $b/title },
<price-amazon> { $a/price/text() } </price-amazon>
<price-bn> { $b/price/text() } </price-bn>
</book-with-prices>
}
</books-with-prices>
Adapted from XML Query Use Cases