Configure Joseki on Ubuntu

1. Download Joseki  – put it under /home/kumar/Documents/

2. Unzip zip file, there will be a folder Joseki-3.4.1

3. In your favourite editor, open .bashrc under your home folder. in my case it is /home/kumar/.bashrc

4. At the end of .bashrc, add the following lines

export PATH=$PATH:/home/kumar/Documents/Joseki-3.4.1

export JOSEKIROOT=/home/kumar/Documents/Joseki-3.4.1

OR

export JOSEKIROOT=/home/kumar/Documents/Joseki-3.4.1

export PATH=$PATH:JOSEKIROOT

You need to declare JOSEKIROOT variable, because JOSEKI installation requires this as it looks for JOSEKIROOT environt variable to locate the JOSEKI files

You add JOSEKIROOT to the environment variable PATH, so that your terminal can locate JOSEKI files

5.  chmod 777 /home/kumar/Documents/Joseki-3.4.1/bin/*
This means, give all rights to all users
#Though Joseki documents recommends chmod u+x bin/* – I am always liberal

6. Open the file joseki-config.ttl located under /home/kumar/Documents/Joseki-3.4.1/

Modify the section ## Datasets of joseki-config.ttl.
Datasets sections contain the location of RDF Dataset on which to Run SPARQL queries.

Here you add the path to the folder where rdf file is located. When you issue the SPARQL query, the query will execute on the listed rdf files in joseki-config.ttl

Under the section ## Datasets, locate the following line

ja:content [ja:externalContent <file:/home/kumar/Desktop/lubm.rdf> ] ;

<file:path to your rdf file>

If you have more than one file, you can repeat this line. This gets inconvenient if there are thousands of file. To solve such issue, use MySQL Server with JOSEKI. We will look in this in the next post.

7. Open terminal, go to /home/kumar/Documents/Joseki-3.4.1
execute the rdfserver script
bin/rdfserver

if there are no errors, you can open a browser type the following URL http://localhost:2020/ and issue queries which will execute on the listed RDF files in joseki-config.ttl