The property tree for a single subject or anonymous node
function propertyTree (subject) {
      // print('Proprty tree for '+subject)
      var rep = myDocument.createElement('table')
      var lastPred = null
      var sts = subjects[sz.toStr(subject)] // relevant statements
      if (!sts) { // No statements in tree
        rep.appendChild(myDocument.createTextNode('...')) // just empty bnode as object
        return rep
      }
      sts.sort()
      var same = 0
      var predicateTD // The cell which holds the predicate
      for (var i = 0; i < sts.length; i++) {
        var st = sts[i]
        var tr = myDocument.createElement('tr')
        if (st.predicate.uri !== lastPred) {
          if (lastPred && same > 1) predicateTD.setAttribute('rowspan', '' + same)
          predicateTD = myDocument.createElement('td')
          predicateTD.setAttribute('class', 'pred')
          var anchor = myDocument.createElement('a')
          anchor.setAttribute('href', st.predicate.uri)
          anchor.addEventListener('click', UI.widgets.openHrefInOutlineMode, true)
          anchor.appendChild(myDocument.createTextNode(UI.utils.predicateLabelForXML(st.predicate)))
          predicateTD.appendChild(anchor)
          tr.appendChild(predicateTD)
          lastPred = st.predicate.uri
          same = 0
        }
        same++
        var objectTD = myDocument.createElement('td')
        objectTD.appendChild(objectTree(st.object))
        tr.appendChild(objectTD)
        rep.appendChild(tr)
      }
      if (lastPred && same > 1) predicateTD.setAttribute('rowspan', '' + same)
      return rep
    }