title: Create an aggregate object RESTfully
body: <p>I haw an aggregate in my domain that have some <code>Guid</code> secondary keys.I want to get more info about these keys from another domains via RESTfull. </p>
  
  <pre><code>public class ProductAggregate
      {
          public Guid Id { get; set; }
          public Guid UserId { get; set; }
          public Guid AgencyId { get; set; }
          public string AgencyTitle { get; set; }
  }
  </code></pre>
  
  <p>In above code the <code>AgencyTitle</code> not exists in current domain and I want to get it from another live service via Restfull and send aggregated object to the client.
  Is it a acceptable way? </p>