From dankwiki
91 bytes added ,  22:28, 19 November 2011
===Service Type Enumeration===
Service types can be enumerated by querying <tt>_services._dns-sd._udp.domain</tt> for a given domain. The reply is a set of PTR records.
* Avahi seems to support Service Type Enumeration, while Bonjour does not (November 2011)
===Service Instance Enumeration===
Rather than using the [[SRV]] record, SD makes use of PTR.