@Override
protected void format(StringBuffer sbuff, Var var) {
NodeId id = idBinding.get(var);
String extra = "";
if (id != null) extra = "/" + id;
Node node = get(var);
String tmp = NodeFmtLib.displayStr(node);
sbuff.append("( ?" + var.getVarName() + extra + " = " + tmp + " )");
}
