we are trying to understand if there is a standard way to combine the Unit
of measurement coming from the geonetwork metadata (CSW or opensearch) with
the value (GREI_INDEX) coming from the WMS getFeatureInfo.
We know that on the WMS side is possible to modify it but the point here is
find a way to delegate to the metadata owner (GeoNetwork metadata creator)
the unit of measure AND show the UOM in the getfeatureinfo.