There is no Standard for invoking actions on a portlet, and it is possible for the format to change from major release to major release. If you were creating this URL from within your CAF application, then by setting the target action property on an extended URL you are guaranteed to be insulated from any changes in the internal format. However, since you are creating this link from outside a CAF application, I would recommend the following approach.
Create a sample portlet that uses the Extended Portlet URL to specify a TargetAction that simulates what you’ll be invoking. After deploying, copy and use that link from your external application.
Hope this helps.
Regards,
–mark
#webMethods-BPMS#webMethods#MWS-CAF-Task-Engine