#data
<gpx><rte>
  <link href="ftp://foo"/>
  <link/>
  <link href="HTtp://foo"/>
  <link href=""/>
</rte></gpx>
#parsed
{"routes":[{
  "links":[{"url":"ftp://foo/"},{"url":"http://foo/"},{"url":"https://base/"}]
}]}

#data
<gpx>
  <metadata>
    <link href="https://example.COM">
      <text></text>
      <text>abc</text>
    </link>
  </metadata>
</gpx>
#parsed
{"links":[{"url":"https://example.com/","text":"abc"}]}

#data
<gpx>
  <metadata>
    <link href="https://example.COM">
      <type>text/plain</type>
      <text>abc</text>
    </link>
  </metadata>
</gpx>
#parsed
{"links":[{"url":"https://example.com/","text":"abc","mime_type":"text/plain"}]}