Update descriptions

Author: epolevikov

interface-elements-for-desktop/articles/report-designer/report-designer-for-winforms/bind-to-data/bind-a-report-to-a-join-based-federated-data-source.md

@@ -34,14 +34,22 @@ This topic describes how to create a federated data source that joins data from
 
     ![](../../../../images/eurd-data-federation-query-builder-drop-table.png)
 
-5. Drag and drop the Excel data source onto the design surface. In the invoked **Join Editor**, select the **Inner join** type and create a relationship based on the key field.
+5. Drag and drop the Excel data source onto the design surface. In the invoked **Join Editor**, select the **Inner join** type and create a relationship based on the **CategoryID** key field.
 
     ![](../../../../images/eurd-data-federation-query-builder-join-tables.png)
 
 6. Enable checkboxes for the data fields you want to include in the query result set.
 
     ![](../../../../images/eurd-data-federation-query-builder-select-fields.png)
 
+    You can specify a different name for a field. Click the field's **Alias** cell and type the alias.
+
+    ![](../../../../images/eurd-data-federation-query-builder-specify-alias.png)
+
+    Use the grid's empty line to add an unbound field to a query. Click the field's ellipsis button to invoke the [Expression Editor](../use-expressions.md) and construct an expression that specifies the field's value.
+
+    ![](../../../../images/eurd-data-federation-query-builder-construct-expression.png)
+
 7. Click **OK** to close the Query Builder. Click **Finish** to complete the Data Source Wizard.
 
 The Wizard creates a new **FederationDataSource** that includes the single query. This data source becomes available in the [Report Explorer](../../../../articles/report-designer/report-designer-for-winforms/report-designer-tools/ui-panels/report-explorer.md)'s **Components** node. The [Field List](../../../../articles/report-designer/report-designer-for-winforms/report-designer-tools/ui-panels/field-list.md) reflects the data source structure.

interface-elements-for-desktop/articles/report-designer/report-designer-for-winforms/bind-to-data/bind-a-report-to-a-union-based-federated-data-source.md

@@ -48,16 +48,12 @@ You can create a federated data source for your report to display data combined
     <!--image-->
     ![](../../../../images/DataFederationUnion-Common-Fields.png)
 
-6. Enable check boxes for the data fields you want to include in the query result set.
-
-    <!--image-->
-
-7. Rename fields.
+6. Rename fields.
 
     <!--image-->
     ![](../../../../images/DataFederation-FieldAliases.png)
 
-8. Click **OK** to close the Query Builder. Click **Finish** to complete the Data Source Wizard.
+7. Click **OK** to close the Query Builder. Click **Finish** to complete the Data Source Wizard.
 
 The Wizard creates a new **FederationDataSource** that includes the single **Customers** query. This data source becomes available in the [Report Explorer](../../../../articles/report-designer/report-designer-for-winforms/report-designer-tools/ui-panels/report-explorer.md)'s **Components** node. The [Field List](../../../../articles/report-designer/report-designer-for-winforms/report-designer-tools/ui-panels/field-list.md) reflects the data source structure.