Information of the data, including a description of the physical element, physical units, location, model information (name, experiment ID, model resolution, etc), valid time period, data source, provenance/processing-history, authors, etc. This information can be used together with other data for the optimal distillation of information.
Metadata is the information attributed or about the data, and typically describes the location (longitudes, latitudes, altitude), time, physical elements, units, data source, type of data (category), and provenance which gives the data a context. Metadata is used for searching/sorting/filtering (data exploration), clustering, transparency/traceability/EQC, to ehnance visualising the information, and for further analysis (metadata is also useful information). The metadata can be extended to provide links to quality evaluations and other relevant data.