inconsistency between handling of wfs_namespace_prefix in GetCapabilities vs GetFeature/DescribeFeatureType operations

[landryb]

From my testing and reading of the code, right now mapserver 8 allows to specify wfs_nameserver_prefix in the WEB METADATA section, and in the LAYER METADATA section.

Depending on how you override one or the other, there are inconsistencies, and i dont know if those are expected/legit or can lead to client bugs.

If i globally set wfs_namespace_prefix to rge in a mapfile via WEB METADATA, querying the GetCapabilities operation returns XML containing FeatureType name attributes properly prefixed by rge:

    <FeatureType>
      <Name>rge:bdtopo_adresse</Name>

But strangely, i can call DescribeFeatureType with a typename parameter containing any prefix, it will return the given layer, eg service=wfs&request=describefeaturetype&typename=xxx:bdtopo_adresse&version=2.0.0 will return the same DescribeFeatureType reply as with ms:bdtopo_adresse or rge:bdtopo_adresse. To me, this doesnt allow to have distinct layers with the same name in multiple prefixes in the same service... (as geoserver allows with its workspaces).

One can also override wfs_namespace_prefix in the LAYER METADATA section, but that isn't taken into account for GetCapabilities, where the WEB METADATA (or the default ms:) prefix is used in the GetCapabilities response.

From my testing with setting a distinct wfs_namespace_prefix in a LAYER METADATA section, it is only used when building DescribeFeatureType responses:

  <element name="bdtopo_adresse" 
           type="bdtopo:bdtopo_adresseType" 

  <element name="dallage_bdortho_rvb_50cm" 
           type="rge:dallage_bdortho_rvb_50cmType" 

while i would have expected the bdtopo_adresse layer to be listed in the GetCapabilities document with the overriden prefix (eg <Name>bdtopo:bdtopo_adresse<Name>) that isnt the case - eg only the global wfs_namespace_prefix is used, or the default ms: in GetCapabilities replies.

The layer-overriden prefix is also correctly used in GetFeature replies, and one can also use any prefix in the typename query parameter, it doesnt have to be the 'correct' one.

[landryb]

with more testing, it seems setting wfs_namespace_prefix breaks GetDescribeFeature replies, as mapserver doesnt list attributes anymore, only the element section:

$curl https://fqdn/rge?language=fra&SERVICE=WFS&REQUEST=DescribeFeatureType&VERSION=1.1.0&TYPENAME=bdtopo:lieux_nommes_detail_orographique' 
<?xml version='1.0' encoding="UTF-8" ?>
<schema
   targetNamespace="http://mapserver.gis.umn.edu/mapserver" 
   xmlns:rge="http://mapserver.gis.umn.edu/mapserver" 
   xmlns:ogc="http://www.opengis.net/ogc"
   xmlns:xsd="http://www.w3.org/2001/XMLSchema"
   xmlns="http://www.w3.org/2001/XMLSchema"
   xmlns:gml="http://www.opengis.net/gml"
   elementFormDefault="qualified" version="0.1" >

  <import namespace="http://www.opengis.net/gml"
          schemaLocation="http://schemas.opengis.net/gml/3.1.1/base/gml.xsd" />

  <element name="lieux_nommes_detail_orographique" 
           type="bdtopo:lieux_nommes_detail_orographiqueType" 
           substitutionGroup="gml:_Feature" />

</schema>

in this test, wfs_namespace_prefix is set to bdtopo. If i comment it (and thus, the rge prefix set at WEB METADATA level is used), the same query properly returns all attributes:

<?xml version='1.0' encoding="UTF-8" ?>
<schema
   targetNamespace="http://mapserver.gis.umn.edu/mapserver" 
   xmlns:rge="http://mapserver.gis.umn.edu/mapserver" 
   xmlns:ogc="http://www.opengis.net/ogc"
   xmlns:xsd="http://www.w3.org/2001/XMLSchema"
   xmlns="http://www.w3.org/2001/XMLSchema"
   xmlns:gml="http://www.opengis.net/gml"
   elementFormDefault="qualified" version="0.1" >

  <import namespace="http://www.opengis.net/gml"
          schemaLocation="http://schemas.opengis.net/gml/3.1.1/base/gml.xsd" />

  <element name="lieux_nommes_detail_orographique" 
           type="rge:lieux_nommes_detail_orographiqueType" 
           substitutionGroup="gml:_Feature" />

  <complexType name="lieux_nommes_detail_orographiqueType">
    <complexContent>
      <extension base="gml:AbstractFeatureType">
        <sequence>
          <element name="the_geom" type="gml:PointPropertyType" minOccurs="0" maxOccurs="1"/>
          <element name="cleabs" minOccurs="0" type="string"/>
          <element name="nature" minOccurs="0" type="string"/>
          <element name="nature_detaillee" minOccurs="0" type="string"/>
          <element name="toponyme" minOccurs="0" type="string"/>
          <element name="statut_du_toponyme" minOccurs="0" type="string"/>
          <element name="importance" minOccurs="0" type="string"/>
          <element name="date_creation" minOccurs="0" type="dateTime"/>
          <element name="date_modification" minOccurs="0" type="dateTime"/>
          <element name="date_d_apparition" minOccurs="0" type="date"/>
          <element name="date_de_confirmation" minOccurs="0" type="date"/>
          <element name="sources" minOccurs="0" type="string"/>
          <element name="identifiants_sources" minOccurs="0" type="string"/>
          <element name="precision_planimetrique" minOccurs="0" type="double"/>
        </sequence>
      </extension>
    </complexContent>
  </complexType>

</schema>