An array 
element contains a single data element
Each data element contains zero or more
 value elements of any type.
An example array:
<array>
  <data>
    <value><boolean>1</boolean></value>
    <value><i4>34</i4></value>
    <value><string>XMl & Java</string></value>
  </data>
</array>
Arrays elements can be arrays or structs