Each struct
element contains one or more
member elements
Each member contains one name
 and one value.
Structs can contain structs
<struct>
 <member>
    <name>index</name>
    <value><i4>7</i4></value>
    </member>
 <member>
    <name>fibonacci</name>
    <value><i4>8</i4></value>
    </member>
 </struct>