Please note that the XSD is not an operational service and does not benefit from the support services that characterize other datastore. If information are required  you , you are welcome to post questions on the ECMWF user forum or contact the corresponding author for the datasets typically available through associated publications and listed below. However  , ECMWF  does does not guarantee full service support for these datasets. They are made available to the scientific community for research purposes as they are, with no commitment from ECMWF to their ongoing maintenance.