Just a quick initial query.

Loading a gpx 1.1 track file containing speeds
using this sort of tagging:

<gpxtpx:TrackPointExtension>
            <gpxtpx:speed>5.051840</gpxtpx:speed>

viking failed to recognise the values. The gpx file passed the xerces
validation test, so it is well formed and matches the schema.
I am very new to this and I am not clear where the semantics of
<gpxtpx:speed> is specified.

But a file using the old gpx 1.0 <speed>...</speed> tags was recognised.
(Using that tag in the 1.1 gpx file resulted in it failing the
validation test: which is perhaps not surpring since <speed> doesn't
appear in https://www.topografix.com/GPX/1/1/gpx.xsd )

Is this a limitation in Viking, or do I need to specify somehow that 
the <gpxtpx:speed> tags have the same meaning as the old <speed> tags?

Apologies if this is a standard stuff: I have yet to read all the
documents around gpx.

ael



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