title: Polymer -> Concept like WPF/SL DataContext in Bindings
body: <p>I want to use Bindings in Polymer Library also outside from Polymer COmponents (vie "dom-bind" of the content body of the Page). Now I have a question, is there a Concept like the "DataContext" of an Element as it is in WPF or SL in Polymer available? That means that I can define Bindings that are relative to a "DataContext" of the Element!</p>
  
  <p>Example:</p>
  
  <pre><code> &lt;div id="droot"&gt;
     &lt;my-conveyor isoccupied={{BB}}&gt;&lt;/my-conveyor&gt;
   &lt;/div&gt;  
  </code></pre>
  
  <p>and I have a Javascript Object like this</p>
  
  <pre><code>{
      HH : {
          BB : true 
      }
  }
  </code></pre>
  
  <p>and I set the DataContext of "droot" to "HH" so that is derived to "my-conveyor". Is something like this possible?
  I need it, because we convert or WPF/SL Views automatically to HTML.</p>