Invalid XML in <trkpt>, empty <link >

[nawagers]

Using the function .to_xml() generates XML with empty tags inside the elements (and possibly others). The gpx schema defines the link as XML LinkType, the definition requires the 'refs' attribute:

<xs:complexType mixed="true" name="LinkType">
<xs:complexContent>
<xs:extension base="baseElementType">
<xs:attribute name="refs" type="xs:IDREFS" use="required"/>
<xs:attribute name="role" type="xs:string"/>
<xs:attribute name="title" type="xs:string"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>

The output trackpoints look like this:

<trkpt lat="41.3342050742358" lon="-72.67007832415402">
<ele>43.88</ele>
<time>2017-09-04T14:59:23Z</time>
<link ></link></trkpt>

The input trackpoints do not have any link tags from a valid GPX modified in Garmin Basecamp. The file does have extensions, but I don't think that matters, haven't investigated fully yet.

Python 3.6.0

GPX In and Out.zip

[nawagers]

Sorry, just realized this is probably a duplicate of #81