ModifiedDetails option outputs in the XML the object modifications details: when the object was last modified and by who for each access class. For example, if the 'img' object with id 5911 has been created on April 3rd at 3:55 PM (UTC), and then its 'Content' attributes have been modified at 4:01 PM and its 'Normal' attributes have been modified on April 6 at 11:57PM, executing ../do.ashx?cmd=objsnav&ids=5911&options=CheckOutInfo&max=5 produces:

  <img id="obj5911" . . .>

    . . .

    <nav:modifiedDetails>

      <nav:normal Action="Update" Time="2011-05-06T23:57:52.357Z" LoginGuid="b6723e10-0269-4ac8-a1cb-1fee59b47416" UserId="1705" UserDesc="TeraDP\MiMo" /> 

      <nav:protected Action="Create" Time="2011-04-03T15:55:19.987Z" LoginGuid="7decb101-42cb-4b4d-9b0d-e4c0d988480d" UserId="1705" UserDesc="TeraDP\MiMo" /> 

      <nav:special Action="Create" Time="2011-04-03T15:55:19.987Z" LoginGuid="7decb101-42cb-4b4d-9b0d-e4c0d988480d" UserId="1705" UserDesc="TeraDP\MiMo" /> 

      <nav:content Action="Update" Time="2011-04-03T16:01:00.170Z" LoginGuid="d89fefef-209b-43f0-af2a-c807aa713a25" UserId="1705" UserDesc="TeraDP\MiMo" /> 

    </nav:modifiedDetails>

    . . . 

  </img>