TCX Schema License

Dear Garmin,

I am an open source software developer interested in using the TCX schema file (https://www8.garmin.com/xmlschemas/TrainingCenterDatabasev2.xsd) in an open source application.

Since I found no hint on the Garmin website on the license of this XSD schema file, is there somebody who knows the nature of the license (preferably someone from Garmin)? Is it freely usable and redistributable?

Thanks in advance!

Best regards,

-Thomas