Re: Defination of privacy/personal information under RTI Act...
CIC (SG) in decision no. Decision No. CIC/SG/A/2010/000505/11673, Appeal No. CIC/SG/A/2010/000505 had given a landmark decision under which the leave details as well as leave application cannot be denied. Hon'ble IC had made the tenet very firm with well reasoned order, a copy which can be accessed in this link posted by Karira:
Hon'ble IC had well traversed the ground raised by the PIO and reflected in your query. Please read the full test of the IC (SG) decision and proceed with appeal, making use of the grounds reflected therein.
Satyameva Jayate सत्यमेव जयते