CSW source does not have a query filter transformer to go from catalog taxonomy to csw record dublin core http://schemas.opengis.net/csw/2.0.2/rec-dcterms.xsd
Currently CSW source rely on the manual metacard mapping in the source configuration.
Once the transformer is in place, the metacard mapping default list should be cleared.
metacard mapping logic should NOT be removed. as it is useful for on the fly mapping.
metacard mapping take precedent over filter transformer
This ticket depends on https://codice.atlassian.net/browse/DDF-4202