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File: Data.xml
<order>
<car model="A">
<id>0001</id>
<name language="en">name 1</name>
</car>
<car model="B">
<id>0002</id>
<name language="en">name 2</name>
</car>
<car model="B">
<id>0003</id>
<name language="en">name 3</name>
</car>
</order>
File: Query.xquery
for $car in doc("Data.xml")//car
return <car>
<id>{$car/id}</id>
<price>{for $price in doc("Data.xml")//prod
where $car/id = $price/@id
return $price/price}</price>
</car>
Output:
<?xml version="1.0" encoding="UTF-8"?>
<car>
<id>
<id>0001</id>
</id>
<price/>
</car>
<car>
<id>
<id>0002</id>
</id>
<price/>
</car>
<car>
<id>
<id>0003</id>
</id>
<price/>
</car>
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