OGR cannot handle unknown attributes in GML geometry elements

[gmoffatt]

Since GDAL 1.9.0, OGR does not properly handle extra unknown attributes in GML geometry elements.

In one case, when viewing such a GML through MapServer, the error "msOGRFileNextShape(): OGR error. Invalid exterior ring." is returned.

According to Even Rouault: The issue is due that newer OGR versions now preserve the XML attributes of the geometry elements of the GML, but the original parser of the GML geometries isn't robust to ignoring attributes it doesn't know how to deal with. Namely in your example the issue is with :

<gml:outerBoundaryIs xmlns:ms="http://mapserver.gis.umn.edu/mapserver" xmlns:wfs="http://www.opengis.net/wfs" xmlns:ogr="http://www.opengis.net/ogr" xmlns:gml="http://www.opengis.net/gml">

A sample of the (admittedly verbose but valid) GML is attached.

[gmoffatt]

Sample GML with extra namespace attributes

[Even Rouault]

Fixed in trunk (r25335) and branches/1.9 (r25336)