+ <opt><host-name></opt>, any number of
+ <opt><subtype></opt> and any number of
+ <opt><txt-record></opt> elements. The attribute
+ <opt>protocol</opt> specifies the protocol to advertise the
+ service on. If <opt>any</opt> is used (which is the default),
+ the service will be advertised on both IPv4 and IPv6.</p>