[Pharo-users] Iceberg, Git and Package version

Hello, How are packages versions computed in Iceberg? I am looking at the Metacello documentation at 'Deep in Pharo', it says I can define dependencies at package level and it uses the following format to identify versions: <dev_name.versionNumber>; which I think is a pattern used by Monticello, right? However, I can't figure what is the equivalent (if any) in Iceberg. Thanks in Advance, Vitor