To Create an Attribute Based Window Operator

1. Drag an Attribute Based Window operator from the Palette to the Design view.

2. Connect the output of an operator that has stream output to the input of the Attribute Based Window operator.

3. Double-click the Attribute Based Window operator.

   The property editor opens. The attributes of the input schema are displayed in read-only mode.

4. In the Attribute drop-down menu, select the attribute that you want to track.

5. In the Size field, enter a numerical value that the operator will use to define the range of values.

   The operator determines the lowest value of the range by subtracting the size from the attribute value of the most recently received event.

   For attributes with the DATE data type, the size represents the number of days.

   For attributes with the TIMESTAMP data type, the size represents the number of seconds.

6. (Optional) Click the Documentation tab and supply notes on this component.

7. Click OK.