subject is the file
function () {
        var query = new $rdf.Query('IRC log entries')
        var v = []
        var vv = ['chan', 'msg', 'date', 'list', 'pred', 'creator', 'content']
        vv.map(function (x) {
          query.vars.push(v[x] = $rdf.variable(x))
        })
        query.pat.add(v['chan'], ns.foaf('chatEventList'), v['list']) // chatEventList
        query.pat.add(v['list'], v['pred'], v['msg']) //
        query.pat.add(v['msg'], ns.dc('date'), v['date'])
        query.pat.add(v['msg'], ns.dc('creator'), v['creator'])
        query.pat.add(v['msg'], ns.dc('description'), v['content'])
        return query
      }