Can you provide an example of what your attempting to accomplish please?
I wasn't trying to be rude when I said that, I was just stating that if we don't know the parameters involved than we can not realistically help you. If there is more to a question than what your posting here, and you don't mention that, ultimately anything we tell you will be wrong.
I still don't understand why the regex won't work. If all of the nodes are the same as what you posted you could scan through and grab either a random node or scan through each node individually using it.
