How to update Subscriber list with the custom attribute assignees List .
2 answers
As far as I am aware, the only way to do that is to create a work item save participant.
Start here: https://rsjazz.wordpress.com/2013/02/28/setting-up-rational-team-concert-for-api-development/
This is a work item save participant that you can use to get started. https://rsjazz.wordpress.com/2012/11/30/a-create-approval-work-item-save-participant/
This is the subscription API, it is client API, but the server API should be very similar and the post above should get you there. https://rsjazz.wordpress.com/2012/08/02/subscribing-to-a-work-item-using-the-java-api/
Start here: https://rsjazz.wordpress.com/2013/02/28/setting-up-rational-team-concert-for-api-development/
This is a work item save participant that you can use to get started. https://rsjazz.wordpress.com/2012/11/30/a-create-approval-work-item-save-participant/
This is the subscription API, it is client API, but the server API should be very similar and the post above should get you there. https://rsjazz.wordpress.com/2012/08/02/subscribing-to-a-work-item-using-the-java-api/
See the Technote "How to automatically add users as subscribers when creating new work items" on http://www-01.ibm.com/support/docview.wss?uid=swg21580771
You can define calculated values and add them to attributes.