The GPX exports from the COROS are not GPX 1.1 compliant, nor are they are GPX 1.0 compliant.
GPX files should be expected to pass XML validation against the GPX 1.1 schema.
It wouldn't take much effort for COROS to tweak their GPX exports to ensure they are compliant with the GPX 1.1 schema. I have written a document with some recommendations / guidance for the developers at COROS:
The GPX exports from the COROS are not GPX 1.1 compliant, nor are they are GPX 1.0 compliant.
GPX files should be expected to pass XML validation against the GPX 1.1 schema.
It wouldn't take much effort for COROS to tweak their GPX exports to ensure they are compliant with the GPX 1.1 schema. I have written a document with some recommendations / guidance for the developers at COROS:
I also wrote some notes relating to GPX files which may serve as useful background information: