"    Input:  {
              (repo_uoa)        - repository UOA
              (data_uoa)        - dataset UOA (can be wildcards)

              (limit)           - size limit (to consider small). By default=500000
            }

    Output: {
              return       - return code =  0, if successful
                                         >  0, if error
              (error)      - error text if return > 0

              dict         - final dict with key 'features'={...} 
            }

"