The subscribe function, symbolized by the 
icon, has been added to allow Web Modelers to track objects in the EPC. By subscribing to objects, Web Modelers will receive notifications when objects are altered or optimized.
The Subscribe button is available for all objects on the toolbar under their Details tab.
The button is displayed in white 
when the Web Modeler is not subscribed to the process and displayed in blue 
when the Web Modeler is subscribed to the process.
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