Change history: G_GPH_OBS

Date/time User Action
Sept. 16, 2021, 11:13 a.m. cvallat (Claire Vallat) obs <-> segments link :: [{'added': {}}]
Oct. 22, 2021, 10:59 a.m. cvallat (Claire Vallat) use _OBS for link to observations list :: [{'changed': {'fields': ['Mnemonic', 'Name', 'Description', 'change_reason']}}]
Oct. 22, 2021, 11:02 a.m. cvallat (Claire Vallat) valid for all traj :: [{'changed': {'fields': ['Trajectories', 'change_reason']}}]