It's even weirder and more frustrating when you look at RR types like WKS and HINFO that were included in the original spec. Rather than be able to say "I run

It's even weirder and more frustrating when you look at RR types like WKS and HINFO that were included in the original spec. Rather than be able to say "I run this service/variant on this port", they included a way to specify which well-known services were running (at the DNS configuration level,) but on the wire it is just a bitmap of putatively open ports.