Well Formed XML

To create a well formed XML data 

<?xml version='1.0'?>

means that the file has xml version 1.0 marked up data

                                    Sample well formed XML file:

<?xml version='1.0'?>
<customers>
    <customer ID="Customer1" Index="1">
        <company_name>ABC Technologies</company_name>
            <first-name>John</first-name>
            <last-name>Doe</last-name>
            <method_of_payment>Visa</method_of_payment>
    </customer>
<customers>