Data search and download:
+ Searching for data? Use keywords!
+ Searching for a specific data type? Use the data type key, such as '1_F' or '3_MC', cf.
the list of all data types!
+ Searching for data from a specific publication? Use main author name or DOI! If data source does not have a DOI, use keywords from report title and publishing institution!
+ Searching for a specific dataset from the catalogue? Use the dataset name!