Patch enables checking for node attribute and filtering results as necessary.
Another nice improvement to the spec that was made since we implemented pubsub. I like this patch and change to the spec.
BTW, we should document somewhere which version of pubsub we are implementing.
I was thinking the same thing. I assume the same would apply to other extensions as well. Knowing it is supported is only goes so far if you are using the spec to try and communicate.
Subscriptions are filtered by node attribute if it is specified.