It’s only official for URIs, outside of URIs there is no official notation because there is no official notation for ports. :port is also a URI thing so while you’ll find a lot of software using URI syntax or something similar it’s the wild west when URIs aren’t in use
It’s only official for URIs, outside of URIs there is no official notation because there is no official notation for ports. :port is also a URI thing so while you’ll find a lot of software using URI syntax or something similar it’s the wild west when URIs aren’t in use