The Service Name used with IEEE 2030.5 DNS-SD SHALL be smartenergy and has been registered appropriately with the Internet Assigned Numbers Authority (IANA).
The <Service> portion of a Service Instance Name consists of the Service Name preceded by an underscore (_) and followed by a period, plus a second DNS label specified by IEEE 2030.5 as _tcp.
Thus, a valid Service Instance Name example would be:
device-000001111114._smartenergy._tcp.site.
Where device-000001111114 is the <Instance> portion (described above), smartenergy is the Service Name, tcp is the transport protocol, and "site." is the <Domain> portion (xmDNS is being utilized in this example).