System Graphs and Server URIs¶

Mulgara maintains a system graph, which is akin to the system tables of a traditional Relational Database system.

The URI of the system graph is generated from the server URI. The server URI is meant to uniquely identify a server and, in the case of a standalone RMI server, describe the location used for querying the server from an RMI client. It is constructed in the following manner:

rmi://<hostname>[:rmiport]/<servername>

where <hostname> is the canonical network name for the host (the result from the 'hostname' command in Linux); [:rmiport] is the optional port number for the RMI registry, specified only if it's running on a different port from the default 1089; and <servername> is the name of the server (you can have multiple servers deployed on the same host; defaults to "server1"). All of these parameters may be changed in the configuration.

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To dump the sysgraph of the default server try executing the following SPARQL query as the Query Text in the sample [[WebUI]] interface (don't forget the angle brackets):
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select ?x ?y ?z from <rmi://localhost/server1#> where {?x ?y ?z}
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