I might not fully understand your question, but while it is pretty easy to get the Value of any CAF.model in javascript, you can also do this with Script Controls.
Please have a look at the attached project. Enter some text and click the button. You’ll see that both the value of the Link as well as the Text has been updated.
Regards,
–mark
URLValueApp.zip (11.5 KB)
#webMethods-BPMS#MWS-CAF-Task-Engine#webMethods