It would be very useful to have a identifier attribute for each list item (zones, statuses, phases, types, etc). Instead of having to rely only on the label of these values, which can change over time, these identifiers would be a lot less likely to change over time.
Of course, these identifiers (or "codes") would change from project to project, as they would be chosen by project admins. In project A the In-progress status could map to "in_progress" and in project B the admin could to choose to also create the same status but use the code "progress"
Once available it will make it easier to map values in BIM Track to their equivalent in another system. Zones and statuses often need to be mapped.