<http://www.talkstats.com/threads/syntax-production-facility-converting-many-csv-data-files-into-sav.76084/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://talkstats.com/threads/syntax-production-facility-converting-many-csv-data-files-into-sav.76084/>