There is an extensive list of attributes supported on the Worldwide
Soaring Turnpoint exchange. These attributes are used directly in
Soaring Turnpoint Exchange (STX) and Tab-delimited files. See this
reference:

http://soaringweb.org/TP/codes.html

SeeYou (.CUP format) doesn't support waypoint attributes directly, but
instead uses a numerical type code.

I see that Dave Nadler has responded elsewhere about the NDB type
codes.

The US waypoint file generator on my website translates the attributes
used in STX and tab-delimited files on the Soaring Turnpoint Exchange
to SeeYou, Cambridge, and NDB formats. See my website for additional
information:

http://www.soaringdata.info

Lynn Alley
"2KA"