I have a very simple, three-column excel file:

I would like to export it to an XML file with the following structure:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<translations>
<item id="USER_NAME">
<en>Username</en>
<de>Username_D</de>
</item>
<item id="PASSWORD">
<en>Password</en>
<de>Password_D</de>
</item>
</translations>
I only managed to use the following mapping file so far
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="translations">
<xs:complexType>
<xs:sequence>
<xs:element ref="item" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="item" id="pippo">
<xs:complexType>
<xs:sequence>
<xs:element name="en" type="xs:string"/>
<xs:element name="de" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
Which almost gives what I want:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<translations>
<item>
<en>Username</en>
<de>Username_D</de>
</item>
<item>
<en>Password</en>
<de>Password_D</de>
</item>
</translations>
How do I set the id field into the idem node?
OK, I found a workaround.
I create an XML like this (i.e. resembling the final result)
Import the XML into Excel via the Developer tab.
Drag it to a new spreadsheet so that I have a new XML-based Excel sheet.
Copy/paste all the values I need and export.
So, for example, this sheet
will produce this XML