Changes the value of a specified attribute
<root>
<node>value</node>
</root>
<Change>
<XPath>/root/node</XPath>
<ChangeValue>new-value</AddAttribute>
</Change>
Alternative version
<Change>
<XPath>/root/node</XPath>
<ChangeValue value="new-value" />
</Change>
<root>
<node>value</node>
</root>