Conversion vocabulary

http://purl.org/twc/vocab/conversion/

DRAFT:

prefix conversion: <http://purl.org/twc/vocab/conversion/>
prefix ov:         <http://open.vocab.org/terms/>
    
select distinct ?predicate
where {
  graph <http://purl.org/twc/vocab/conversion/ConversionProcess> {
    ?s ov:csvCol ?col; ?predicate ?o .
    filter regex(?p, "^http://purl.org/twc/vocab/conversion/.*")
  }
  optional {
    GRAPH <http://purl.org/twc/vocab/conversion/> {
      ?defined ?p ?o
    }
  }
  filter(?predicate = ?defined)
  filter(!bound(?defined))
}