<div>
    <h3>Order Processing System</h3>

    <div>
        <label>Order # {{order.id}}</label>
        <label>Order Date {{order.date}}</label>
    </div>

    ....

   <div>
      <item-details *ngIf="itemSelected"
          [item]="itemSelected"
          [notifyItemProcessed]="processOrderItems" ></item-details>
   </div>

</div>