I've read the "CUCM Developers Guide" and the "CUCM CDR Analysis and Reporting Administration Guide for Cisco Unified Communications Manager", but I can't find any information about the meaning of the tags in the RisPort responses.
 
1 - In the RisPort response I get a "TimeStamp"  for each device (e.g. 1352664250), what does this TimeStamp means? Is it the time that the device was registered in the CUCM?
2 - Does the "SubsystemStartTime" refer to the CUCM's time setup?
3 - How can I get a timestamp referring to the time that a RisPort response was sent? Here are the several "timestamps" tags that I get in a RisPort response: 
<item>
...
<TimeStamp xsi:type="xsd:unsignedInt">1352664250</TimeStamp>
...
</item>
<StateInfo xsi:type="xsd:string">
&lt;StateInfo ClusterWide=&quot;1&quot;&gt;&lt;Node Name=&quot;192.168.10.42&quot; SubsystemStartTime=&quot;1351450678&quot; 
StateId=&quot;50&quot; TotalItemsFound=&quot;2&quot; 
TotalItemsReturned=&quot;2&quot;/&gt;&lt;/StateInfo&gt;
 
Thank you so much !