In the ProjPlanVersionDetail, what does the VersionType column signify?

In the ProjPlanVersionDetail, what does the VersionType column signify?
Hi Puccia,
This is the enum field which is having 3 elements Draft, Published and Old published.
I guess this is used to identify the status of work break down tasks.
You can open the work break down structure form and on the top you will have the status field. This field is based on the Version type column.
Thanks,
Girish S.