How to take time from a WTTlog file

Does anyone WTTlog date system? I need to take data from a xml, and i don't know how.

First time i was thinking the system is relative, but i didn't find anything.

Know someone same things that can maybe help? Thanks.

<Msg UserText="WindowsVersion 6.2.9200 64bit" CA="3246234" LA="3245553">
      <rti id="234352432" /> 
      <ctx id="123432423" /> 
      </Msg>

This is how it's look, and i don't know which is the date.