This is for app devs to recognise global service names like the /etc/services in linux, so you know port 80 is www *usually) and 25 is telnet etc. So these services will build so you know if you retrieve a www service then parse as html pages, blog as a blog type connector etc. It’s an idea to allow globally agreed services really, if that helps. So you can have
@happybeing www
@happybeing blog
and apps will know to treat these as such. Some may be built in to the network as fixed, but like service not fixed in any way they cannot be ignored or broken by clients parsing www as email fro instance, but fixed as in feels globally recognise.
It will ti in to hopefully some standards across apps to allow interoperability I hope.