[GeoNetwork-users] WMO Thesaurus

hi everybody,
I've a network of weather stations and I'm filling out related metadata
following the guidelines provided by WMO.
Regarding keywords, I would like to use a controlled-vocabulary like

http://www.wmo.int/pages/prog/www/WMOCodes/TDCFtables.html

they're some tables in doc,pdf, txt and xml format.

is there any implementation (conversion) in SKOS format (supported by GN)?

thanks in advance