  Charm mixing and CP violation observables are examined in the light of the
recently reported evidence from LHCb for CP violation in the charm sector. If
the result is confirmed as being due to direct CP violation at the 1% level,
its effect will need to be taken into account in the interpretation of CP
violation observables. The contributions of direct and indirect CP violation to
the decay rate asymmetry difference DeltaACP and the ratios of effective
lifetimes AGamma and yCP are considered here. Terms relevant to the
interpretation of future high precision measurements which have been neglected
in previous literature are identified.
