Dependencies / Depends on - any changes ?

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As far as I know this is still the case, I can't find any operational behavior on work item save for this, but it would be possible to write an extension (Advisor) that checks specific conditions e.g. at a state change and prevents saving.
https://jazz.net/wiki/bin/view/Main/RTCSDK20_ProcessPreConditionExample shows how that would be done.
https://jazz.net/library/article/1000 shows more details.
https://rsjazz.wordpress.com/2012/07/31/rtc-update-parent-duration-estimation-and-effort-participant/ shows additional links for information and how to follow relationships (parent child, but all that changes is the tape for blocks).
https://jazz.net/wiki/bin/view/Main/RTCSDK20_ProcessPreConditionExample shows how that would be done.
https://jazz.net/library/article/1000 shows more details.
https://rsjazz.wordpress.com/2012/07/31/rtc-update-parent-duration-estimation-and-effort-participant/ shows additional links for information and how to follow relationships (parent child, but all that changes is the tape for blocks).