ISOFIX is an international standard for lower anchorages for child restraints. (That is the "bars" in the seat bite). LATCH is an acronym of sorts: Lower Anchorages and Tethers for CHildren used in the US that refers to both the lower anchor anchorages and the "top tether" which secures the child seat against rotation (forwards) in a crash. Most current generation European cars have ISOfix lower anchorages. The system introduced in North America through FMVSS 225 also includes top tethers (not required in Europe yet). The major aim of ISOFIX / LATCH is to reduce the risk of mis-installation of the child restraint.
Does your car have "top tether" attachments (they would be on the parcel shelf). From memory FMVSS 225 has a phased introduction which requires manufacturers to fit top tether anchorages for rear seats with a later introduction of a requirement for ISOFix type lower anchorages (the top tether can be used in combination with the conventional seatbelt type attachment).
Have a read of http://www.nhtsa.dot.gov/people/injury/childps/LATCH/ for more details.
I'm in Australia so I don't know which model years were fitted with what for the US/Canada market, but we've had top tethers since the '70s.

Mark