This format can...
read and write waypoints
This format is derived from the xcsv format, so it has all of the same options as that format.
This is a very simple format that is most useful for exporting data from units that support heart rate data such as Garmin Forerunner 301™, Garmin Forerunner 305™, and Garmin Edge 305™, and to other programs for analysis. It's a simple comma delimited format that includes the timestamp, 3D position information and heart rate so you can pull it into a spreadsheet or graphing program.