gistfile1.txt

<div data-dojo-type="dojo.data.ItemFileReadStore" data-dojo-id="continentStore"
  data-dojo-props="url:'{{dataUrl}}/dijit/tests/_data/countries.json'"></div>
<div data-dojo-type="dijit.tree.ForestStoreModel" data-dojo-id="continentModel"
  data-dojo-props="store:continentStore, query:{type:'continent'},
  rootId:'continentRoot', rootLabel:'Continents', childrenAttrs:'children'"></div>

<div data-dojo-type="dijit.Tree" id="mytree"
  data-dojo-props="model:continentModel, openOnClick:true">
  <script type="dojo/method" data-dojo-event="onClick" data-dojo-args="item">
    alert("Execute of node " + continentStore.getLabel(item)
        +", population=" + continentStore.getValue(item, "population"));
  </script>
</div>