GML xsi:schemaLocation confusion

[Kurt Schwehr]

Looking at what ogr2ogr writes for schemaLocation is confusing and what the tests have is often weird with spaces in the name an files that certainly don't exist on maptools.org. e.g.

xsi:schemaLocation="http://ogr.maptools.org/ ogr_gml_55.xsd"

I'm guessing this doesn't really matter as most parsers will not try to fetch the non-existent xsd, but this can't be correct. What should be in that field so that if a parser were to try to validate it, it would have some hope? Or can we leave the field out or put in something that will short circuit looking for it?

And the space?

r24481 introduced maptools.org

Running ogr2ogr -f gml point.gml point.geojson yields:

<?xml version="1.0" encoding="utf-8" ?>
<ogr:FeatureCollection
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://ogr.maptools.org/ point.xsd"
     xmlns:ogr="http://ogr.maptools.org/"
     xmlns:gml="http://www.opengis.net/gml">
  <gml:boundedBy>
    <gml:Box>
      <gml:coord><gml:X>100</gml:X><gml:Y>0</gml:Y></gml:coord>
      <gml:coord><gml:X>100</gml:X><gml:Y>0</gml:Y></gml:coord>
    </gml:Box>
  </gml:boundedBy>
                                                                                                                                                            
  <gml:featureMember>
    <ogr:point fid="point.0">
      <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>100,0</gml:coordinates></gml:Point></ogr:geometryProperty>
    </ogr:point>
  </gml:featureMember>
</ogr:FeatureCollection>

[Even Rouault]

xsi:schemaLocation="http://ogr.maptools.org/ ogr_gml_55.xsd" is perfectly correct. This means that the schema for namespace URI "​http://ogr.maptools.org/" is in "ogr_gml_55.xsd"