Display the gml:id of WFS layer as an attribute in QGIS

Question

I have loaded a WFS layer in QGIS and want to display the gml:id of the features in the attribute table. Is this somehow possible? I can see the gml:ids in other applications (ex FME).

Answer 1

I'm not sure if it's possible in the attribute table unless the WFS defines the identifier as an attribute.

You can check by doing a DescribeFeatureType request like:

http://services.sandre.eaufrance.fr/geo/zon_FXX?SERVICE=WFS&REQUEST=DescribeFeatureType&VERSION=2.0.0&TYPENAMES=sa:Sage&outputformat=text/xml;%20subtype=gml/2.1.2&

Which in this example gives:

<?xml version='1.0' encoding="UTF-8" ?>
<schema
   targetNamespace="http://xml.sandre.eaufrance.fr/" 
   xmlns:sa="http://xml.sandre.eaufrance.fr/" 
   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/2.1.2/feature.xsd" />
  <element name="Sage" 
           type="sa:SageType" 
           substitutionGroup="gml:_Feature" />
  <complexType name="SageType">
    <complexContent>
      <extension base="gml:AbstractFeatureType">
        <sequence>
          <element name="msGeometry" type="gml:GeometryPropertyType" minOccurs="0" maxOccurs="1"/>
          <element name="CodeNatZone" minOccurs="0" type="string"/>
          <element name="NomZone" minOccurs="0" type="string"/>
          <element name="TypeZone" minOccurs="0" type="integer"/>
          <element name="EtatAvancementSage" minOccurs="0" type="string"/>
          <element name="TypePerimSage" minOccurs="0" type="string"/>
        </sequence>
      </extension>
    </complexContent>
  </complexType>
</schema>

So no gml:id defined as an attribute, which is reflected in the attribute table in QGIS.

However, you can get to the gml:id for the selected feature in QGIS by looking at the Derived values > Feature ID