Pencil edit: added periods to alt-text

Author: denrea

articles/data-factory/concepts-data-flow-udf.md

@@ -21,14 +21,14 @@ Whenever you find yourself building the same logic in an expression in across mu
 
 To get started with user defined functions, you must first create a data flow library. Navigate to the management page and then find data flow libraries under the author section.
 
-![Screenshot showing the A D F management pane and data flow libraries](./media/data-flow-udf/data-flow-udf-library.png)
+![Screenshot showing the A D F management pane and data flow libraries.](./media/data-flow-udf/data-flow-udf-library.png)
 
 
 
 ## Data flow library
 
 From here, you can click on +New button to create a new data flow library. Fill out the name and description and then you are ready to create your user defined function.
-![Screenshot showing the data flow libraries creation pane](./media/data-flow-udf/data-flow-udf-library-create.png)
+![Screenshot showing the data flow libraries creation pane.](./media/data-flow-udf/data-flow-udf-library-create.png)
 
 ## New user defined function
 
@@ -52,4 +52,4 @@ The body of the user defined function is where you specify the logic of your fun
 
 User defined functions will appear in the mapping data flow expression builder under Data flow library functions. From here, you can use your custom created functions and pass in appropriate arguments (if any) that you've defined.
 
-![Screenshot showing the data flow library in the mapping data flow expression builder.](./media/data-flow-udf/data-flow-udf-expression-builder.png)
+![Screenshot showing the data flow library in the mapping data flow expression builder.](./media/data-flow-udf/data-flow-udf-expression-builder.png)