| HS_SERV is described in the RFCs, although the description has some outdated details. An HS_SERV value's data is intended to be a handle, the handle record for which has HS_SITE values. Thus it describes a handle service. When an HS_SERV value is in a prefix handle record, the service described by the HS_SERV value can be used to access handles under that prefix. In particular, HS_SERV values in the 0.NA/0.NA record can be used to access prefix handles; thus, the sites indirectly listed via those HS_SERV values are part of the GHR. What has changed since the publication of the RFCs is (1) a prefix handle can have more than one HS_SERV value, or a mix of HS_SITE and HS_SERV values; and (2) the GHR's servers can also be described by HS_SERV values on 0.NA/0.NA. Organizationally, each MPA which administers global handle servers has its own HS_SERV value on 0.NA/0.NA. A selection of HS_SITE values remain on the record as well, to enable use by legacy clients which do not understand HS_SERV values on 0.NA/0.NA. Robert
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