QGIS/python/plugins/MetaSearch/resources/connections-default.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- Guidance: https://docs.qgis.org/2.18/en/docs/user_manual/plugins/plugins_metasearch.html#managing-catalog-services -->
<qgsCSWConnections version="1.0">
    <csw name="USA: Data.gov CSW" url="https://catalog.data.gov/csw-all"/>
    <csw name="Danmark: National CSW" url="http://www.geodata-info.dk/registrant/srv/en/csw"/>
    <csw name="Finland: National CSW (Paikkatietohakemisto)" url="http://www.paikkatietohakemisto.fi/geonetwork/srv/fi/csw"/>
    <csw name="Greece: Geodata.gov.gr CSW" url="http://geodata.gov.gr/csw"/>
    <csw name="Iceland: National CSW (Iceland Service)" url="http://gatt.lmi.is/geoportal122/csw"/>
    <csw name="Italy: National CSW (Geoportale Nazionale - Servizio di ricerca Italiano)" url="http://www.pcn.minambiente.it/geoportal/csw"/>
    <csw name="Italy: RNDT - Repertorio Nazionale dei Dati Territoriali - Servizio di ricerca" url="http://www.rndt.gov.it/RNDT/CSW"/>
    <csw name="New Zealand: LINZ Data Service" url="https://data.linz.govt.nz/services/csw/"/>
    <csw name="Netherlands: National CSW (Nationaal Georegister)" url="http://www.nationaalgeoregister.nl/geonetwork/srv/dut/csw"/>
    <csw name="Norway: National CSW (Geonorge)" url="http://www.geonorge.no/geonetwork/srv/no/csw"/>
    <csw name="Sweden: National CSW" url="http://www.geodata.se/InspireCswProxy/csw"/>
    <csw name="UK Location Catalogue Publishing Service" url="http://csw.data.gov.uk/geonetwork/srv/en/csw"/>
    <csw name="UNEP GRID-Geneva Metadata Catalog" url="http://metadata.grid.unep.ch:8080/geonetwork/srv/eng/csw"/>
    <csw name="Portugal: Sistema Nacional de Informação Geográfica (SNIG)" url="http://snig.dgterritorio.pt/geoportal/csw/discovery"/>
    <csw name="Spain: Centro Nacional de Información Geográfica (CNIG)" url="http://www.ign.es/csw-inspire/srv/spa/csw"/>
</qgsCSWConnections>