protected void addSilentTransition(Node node, ImportContext c) {
    SilentTransition t = new SilentTransition();
    c.getNet().getTransitions().add(t);
    c.getObjects().put(getResourceId(node), t);

    for (Node n = node.getFirstChild(); n != null; n = n.getNextSibling()) {
      if (n instanceof Text) continue;
      String attribute = n.getNodeName().substring(n.getNodeName().indexOf(':') + 1);

      if (attribute.equals("outgoing")) {
        c.getConnections().put(getResourceId(getAttributeValue(n, "rdf:resource")), t);
      } else if (attribute.equals("propability")) { // not copied
        String content = getContent(n);
        if (content != null) t.setPropability(Integer.parseInt(content));
      }
    }
    if (t.getId() == null) t.setId(getResourceId(node));
  }