Create XML from a Spreadsheet

[Philosophaie]

In a spreadsheet I have three columns of Data: A5sun, B5sun and C5sun. I created a xsd schema see below. I added Data.xsd to XML Maps.
How do I use the data in the spreadsheet to create Data.xml?

Data.xsd

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="VSOP87">
<xs:complexType>
<xs:sequence>
<xs:element name="A5sun" type="xs:double"/>
<xs:element name="B5sun" type="xs:double"/>
<xs:element name="C5sun" type="xs:double"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>