Waypoint and Outline structure

[Faramir]

Please forgive me if this has been asked before, but I did a quick search but I couldn't find it anywhere. Does someone know the structure of BaseStation's waypoint file?
What I have is:

1: name
2: waypointtype
3: ?
4: latitude
5: longitude
6: ?

Who can fill in the blanks?

[Faramir]

Thank you Pipo for pointing me to good old Bones's explanation!!

[Anmer]

Thank you Pipo for pointing me to good old Bones's explanation!!

http://woodair.net/sbs/Article/Barebones32_BaseStation.htm

[Faramir]

http://woodair.net/sbs/Article/Barebones32_BaseStation.htm

Should have thought about that, my mistake.
Thanks Mike!