<?xml version="1.0" encoding="UTF-8"?>
<ItemsList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 <Item xsi:type="ItemWithNumber">
  <Name>Name1</Name>
  <Number>20</Number>
 </Item>
 <Item xsi:type="ItemWithNumber">
  <Name>Name1</Name>
  <Name>Name2</Name>
  <Number>20</Number>
 </Item>
</ItemsList>
