create or replace view vtriples as
select triples.id,
       stype, svalue, show(stype, svalue) as stext, 
       predicate, show(dt.id, predicate) as ptext, 
       otype, ovalue, show(otype, ovalue) as otext,
       events.tstamp as ts
  from triples, datatypes dt, events
  where dtname = 'node'
    and events.id = creation
    and deletion is null
;