2011 International Database Engineering and Applications Symposium, Ideas'11, Date: 21 September 2011 through 23 September 2011, Location: Lisbon, Sponsors: The Association for Computing Machinery (ACM);BytePress;Concordia University;ConfSys.org;Inst. Super. Eng. Lisboa (ISEL)/Inst. Politec. Coimbra (IPC)