How to update 'Unassigned' as a value in plannedFor field using OSLC/REST API or Plain client java libraries?
One answer
for the Java APIs see https://jazz.net/forum/questions/254374/is-it-possible-to-fetch-unassigned-value-for-plannedfor-field-in-rtc-using-oslc-query-or-reportable-api-or-ibm-sdk
I would assume that removing the attribute is equal to null. Maybe not.
In general it is a really good idea to get examples and check how this looks like in the real world.