Hi Jen,

A related followup note is that we're currently working on making the specimen tables customizable, which might allow you to track this kind of information in a custom column in the future.

In November, we did the work to move the specimen tables over to an implementation that allows us to add custom columns on a per-container/study basis, though we haven't yet enabled customization.

In December, we plan to continue to allow customization of the columns. I expect that there will continue to be the base set of columns that are required (much as datasets have some required columns, like ParticipantId).

If this is of interest to you, I can see if there's a spec that's ready for sharing.

Thanks,
Josh