XEP-Remarks/XEP-0060: PubSub

= Missing functionality = XEP-60 appears to be missing some important use cases, so that some implementations have to resort to using their own flavor of PubSub, e.g. Buddycloud. Which prevents those projects from using standard compliant PubSub implementations (e.g. Buddycloud uses a patched version of Smack's PubSub implementation).