{
  variables = {
    postDisplayGroup = {
      class      = WODisplayGroup;
      dataSource = {
        class              = EOCoreDataSource;
        editingContext     = session.defaultManagedObjectContext;
        fetchSpecification = {
          class      = EOFetchSpecification;
          entityName = Post;
          fetchLimit = 0;
          isDeep     = YES;
          sortOrderings = (
            { class = EOSortOrdering; 
              key = "title";
              selector = "compareAscending:";
              /* Tiger?: selector = "compareCaseInsensitiveAscending:"; */
            }
          );
        };
      };
      formatForLikeQualifier       = "%@*";
      localKeys                    = ();
      numberOfObjectsPerBatch      = 0;
      selectsFirstObjectAfterFetch = YES;
      fetchesOnLoad                = YES;
    };

    authorDisplayGroup = {
      class = WODisplayGroup;
      dataSource = {
        class              = EOCoreDataSource;
        editingContext     = session.defaultManagedObjectContext;
        fetchSpecification = {
          class      = EOFetchSpecification;
          entityName = Author;
        };
      };
      fetchesOnLoad           = YES; 
      formatForLikeQualifier  = "*%@*"; 
      localKeys               = (); 
      numberOfObjectsPerBatch = 30; 
      selectsFirstObjectAfterFetch = YES; 
      sortOrdering = ( // proper position?
        {
          class = EOSortOrdering; 
          key   = name;
          selectorName = "compareAscending:";
        }
      ); 
    }; 

    topicDisplayGroup = {
      class = WODisplayGroup;
      dataSource = {
        class              = EOCoreDataSource;
        editingContext     = session.defaultManagedObjectContext;
        fetchSpecification = {
          class      = EOFetchSpecification;
          entityName = Topic;
        };
      };
      fetchesOnLoad           = YES; 
      formatForLikeQualifier  = "*%@*"; 
      localKeys               = (); 
      numberOfObjectsPerBatch = 30; 
      selectsFirstObjectAfterFetch = YES; 
      sortOrdering = ( // proper position?
        {
          class = EOSortOrdering; 
          key   = title;
          selectorName = "compareAscending:";
        }
      ); 
    }; 
  };
}