GPX export does not care for GPX 1.0 -> GPX 1.1 translation

[bastiK]

Currently the OSM server returns GPX 1.0 xml when you request raw GPS data. If you save that layer to a file in JOSM, the result is not a valid GPX file. Basically JOSM saves as GPX 1.1 (no matter what the input format was) but does not care for the differences of these versions.

A second (unrelated) reason why the validation fails, is that JOSM writes the attributes in random order, but the order is clearly defined in the schema file.

GPX 1.0: ​documentation ​schema

GPX 1.1: ​documentation ​schema

Here is a list of differences (should be complete):

• GPX 1.0 has url/urlname string properties. They are gone in GPX 1.1 and replaced by by a complex element <link> of the form

  <link href="http://...">
      <text> string value </text>
      <type> string value </type>
  </link>
  

text and type are optional, but the <link> element can occur multiple times (in contrast to url/urlname)

• Extensions are handled differently. In GPX 1.0 it looks like this:

    <trk>
      <desc>...</desc>
      <name>...</name>
      <url>http://api.openstreetmap.org/user/...</url>
      <josm:test> random stuff here </josm:test>
      ...
    </trk>
  

  And in GPX 1.1 like this:

    <trk>
      <desc>...</desc>
      <name>...</name>
      <link href="/user/..."/>
      <extensions>
        <josm:test> random stuff here </josm:test>
      </extensions>
      ...
    </trk>
  

• In GPX 1.0, properties like name or desc are direct children of the <gpx> element. In GPX 1.1 they are grouped inside a <metadata> element. Also the allowed properties are different: The string fields author and email in GPS 1.0 have been changed to one complex element <author> with name, email and link as children. The properties <copyright> (complex type) and time have been added in GPX 1.1.

• For the <rte> and the <trk> element, the property type has been added in GPX 1.1.

• For <trkpt>, the old properties course and speed have been removed.

• Extensions are possible for <trkseg> in GPX 1.1.

[bastiK]

In 5395/josm:

gpxreader: minor refactoring, read version & creator (see #7927)

[bastiK]

In 5398/josm:

convert gpx 1.0 to 1.1 (fixes #7927)

[bastiK]

In [5397]:

fix element ordering when writing gpx (see #7927)