Using the relative path, does not lock the version of the XSD. As the XML should be compatible down to 5.2, I think it's better to keep the URL. Otherwise you just verify the XML against the XSD present in your current local Shopware version (which would usually be newer) .
Using the relative path, does not lock the version of the XSD. As the XML should be compatible down to 5.2, I think it's better to keep the URL. Otherwise you just verify the XML against the XSD present in your current local Shopware version (which would usually be newer) .