CreationAndModified option causes the output of the creation and last modification details of the objects – e.g. ../do.ashx?cmd=objsnav&ids=587&options=creationandmodified produces:

  <article nav:objectType="article" id="obj5875" . . . >

    <nav:objectTypeAttrs . . ./>

    <nav:creation>

      <nav:actionDesc Action="Create" Time="2011-01-28T23:54:09.727Z" . . ./> 

    </nav:creation>

    <nav:modified>

      <nav:actionDesc Action="AutoUpdate" Time="2011-02-03T20:36:19.593Z" . . . /> 

    </nav:modified>

    <folderRef idref="obj8">

    . . .

  </article>

This option is enabled by default for the backward-compatibility.