title: Dates transformation using CLEM expression(spss modeler)
body: <p>i hope, that here there is specialist of clementine or IBM SPSS MODELER.
  My question: How use Clem expression to transform date?
  For example i have this format of date</p>
  
  <pre><code>27.10.15.15:05
  27.10.15.15:45
  27.10.15.16:10
  </code></pre>
  
  <p>if the date value &lt; 30 then, round to 1 min
  i.e. not 15:05, but 15:01 , if the date value > 30 min then, round to 31 min, i.e. not 15:45, but 15:31. What about 16:10, since it  &lt; 16:30 then, round to 16:01.
  generally speaking date must be in the follow format</p>
  
  <pre><code>27.10.15.15:01
  27.10.15.15:31
  27.10.15.16:01
  </code></pre>
  
  <p>One man  told me, that it's should to use this expression <code>datetime_in_seconds(?)</code>
  But i really don't know how use it. Please help me to transform this date in needed for me format</p>