Juno users: Sirius depends on a version of the Guava library which is not available by default from a Juno install. You need to add the Orbit update-site at http://download.eclipse.org/tools/orbit/downloads/drops/R20130827064939/repository/ if you want to install Sirius on Juno.
From the sources
From a local Git clone of http://git.eclipse.org/gitroot/sirius/org.eclipse.sirius.git, and provided you have Maven 3 installed, you can build Sirius locally from the top-level directory with the following command:
mvn clean package
The resulting update-site is then available in
The documentation is available in the help system under the "Sirius" top-level category. You can also browse the doc from http://www.eclipse.org/sirius/doc.