Mini-Howto for Apache Jena RDF Framework /ARQ SPARQL engine

Installation:
Download the complete Jena Framework from the Apache Incubator:

http://www.apache.org/dist/incubator/jena/apache-jena-2.7.0-incubating.zip

Unpack to a directory, e.g. C:\Whatever\Apache-Jena-2.7.0-incubating or /home/user/apache-jena-2.7.0-incubating

Set the JENAROOT environment variable

- On Linux/Mac (with the bash shell):
  open a shell
  export JENAROOT=/home/user/apache-jena-2.7.0-incubating

- On Windows:
  Open Systemsteuerung/Control Panel
  Search for "Umgebungsvariablen"/Environment Variables (you should get 2 hits)
  Open "Umgebungsvariablen für dieses Konto"
  Add a new user variable JENAROOT, with the value containing the installation path of Jena, e.g. C:\Whatever\Apache-Jena-2.7.0-incubating 

Run Queries:
- On Mac/Linux, use the shell you opened before
- On Windows, open a command prompt/Eingabeaufforderung

Go to the installation directory
- On Mac/Linux, go to the "bin" directory
- On Windows, go to the "bat" directory

You can now run ARQ as follows:

./sparql --query q17a.rq --graph persons.n3 (Mac/Linux)
or 
sparql.bat --query q17a.rq --graph persons.n3 (Windows)