QGIS » QGIS Application

<wfs:GetFeature xmlns:wfs="http://www.opengis.net/wfs" service="WFS" version="1.1.0"

                outputFormat="text/xml; subtype=gml/3.1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

    <wfs:Query typeName="feature:layer1" srsName="EPSG:4326" xmlns:feature="http://www.qgis.org/gml">

        <Filter xmlns="http://www.opengis.net/ogc">

            <BBOX>

                <PropertyName>id</PropertyName>

                <Envelope xmlns="http://www.opengis.net/gml" srsName="EPSG:4326">

                    <lowerCorner>-180 -40</lowerCorner>

                    <upperCorner>0 90</upperCorner>

                </Envelope>

            </BBOX>

        </Filter>

    </wfs:Query>

    <wfs:Query typeName="feature:layer2" srsName="EPSG:4326" xmlns:feature="http://www.qgis.org/gml">

        <Filter xmlns="http://www.opengis.net/ogc">

            <BBOX>

                <PropertyName>id</PropertyName>

                <Envelope xmlns="http://www.opengis.net/gml" srsName="EPSG:4326">

                    <lowerCorner>-180 -40</lowerCorner>

                    <upperCorner>0 90</upperCorner>

                </Envelope>

            </BBOX>

        </Filter>

    </wfs:Query>

</wfs:GetFeature>