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File: Data.xml
<?xml version="1.0"?>
<Books>
<Book>book 1</Book>
<Book>book 2</Book>
<Book>book 3</Book>
</Books>
File: Query.xquery
<library count="{count(doc("Data.xml")/Books/Book)}">{
for $b in doc("Data.xml")/Books/Book
return <book>{$b/text()}</book>
}</library>
Output:
<?xml version="1.0" encoding="UTF-8"?>
<library count="3">
<book>book 1</book>
<book>book 2</book>
<book>book 3</book>
</library>
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