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As different repositories uses different persistent identifiers to address their content, different algorithms to create URIs used within the converted data can be implemented. Currently HTTP(S)-URIs of the repository (called local URIs), handles and DOIs can be used. See the configuration part of this document for further information. If you want to add another algorithm, take a look on the interface org.dspace.rdf.storage.URIGenerator.

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Install a Triple Store

In addition to a normal DSpace Installation installation you have to install a triple store. You can use any triple store that supports SPARQL 1.1 Query Language and SPARQL 1.1 Graph Store HTTP Protocol. If you do not have one yet, you can use Apache Fuseki. Download Fuseki from its official download page and unpack the downloaded archive. The archive contains several scripts to start fuseki. Use the start script appropriated for the OS of your choice with the options '--localhost --config=<dspace-install>/config/modules/rdf/fuseki-assembler.ttl'. Instead of changing into the directory you unpacked fuseki to, you may set the variable FUSEKI_HOME. If you're using Linux, unpacked fuseki to /usr/local/jena-fuseki-1.0.1 and installed DSpace to /var/dspace this would look like this:

 export FUSEKI_HOME=/usr/local/jena-fuseki-1.0.1 ; $FUSKI_HOME/fuseki-server --localhost --config [dspace-install]/config/modules/rdf/fuseki-assembler.ttl

Fuseki's archive contains a script to start fuseki automatically at startup as well.

The configuration provided within DSpace makes it store the files for the triple store under [dspace-install]/triplestore. Using this configuration, Fuseki provides three SPARQL endpoints. Two read-only sparql endpoint and one that can be used to change the data of the triple store. You should not use this configuration and let Fuseki connect to the internet directly as it would make it possible for anyone to delete, change or add information to the triple store. The option --localhost tells fuseki to listen only on the loopback device. You can use Apache mod_proxy or any other web or proxy server to make the read-only SPARQL endpoint accessible from the internet. With the configuration described Fueski listen to the port 3030 using http. Using the address http://localhost:3030/ you can connect to the Fuseki Web UI, http://localhost:3030/data addresses a writeable SPARQL 1.1 HTTP Graph Store Protocol endpoint, and  http://localhost:3030/get a read-only one. Under http://localhost:3030/sparql a read-only SPARQL 1.1 Query Language endpoint can be found. The first of these endpoints one must be not accessable by the internet, while the last one should be accessible publicly.

Configuration

Maintenance

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