freedesktop - Mar 2011 - [fdo] Global architecture ?

Hello,

I'm working on an Openmoko FreeRunner where I'm supposed to use the GPS
module.
I just have a question about the global architecture concerning the
different layers from the hardware to the final GPS application.
I'm using ogpsd, fso-gpsd, etc. What is "Gypsy" then ?

Is this scheme correct :

hardware <-> ogpsd (= gypsy) <-> fso-gpsd <-> tangoGPS

Thanks a lot,
Vincent