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You need a webserver (tested with Apache, but I hope it also runs with nginx and lighttd) with PHP (including curl) and a database backend which is supported by Erfurt (MySQL and Virtuoso).
Run git submodule init and git submodule update to clone Erfurt.
Take the prepared config.ini-dist file and copy it to config.ini and configure it according to your system setup.
You have to place a copy of the Zend fraimework library into libraries/Zend/ you can do this by doing the following things (replace ${ZENDVERSION} e.g. by 1.11.5):
wget http://framework.zend.com/releases/ZendFramework-${ZENDVERSION}/ZendFramework-${ZENDVERSION}-minimal.tar.gz
tar xzf ZendFramework-${ZENDVERSION}-minimal.tar.gz
mv ZendFramework-${ZENDVERSION}-minimal/library/Zend libraries
rm -rf ZendFramework-${ZENDVERSION}-minimal.tar.gz ZendFramework-${ZENDVERSION}-minimal
Create an empty log file called spb.log
touch spb.log
Currently, this project is developed using OntoWiki's coding standard.