I have found a documentation about the "Integrated Ontology Development Toolkit" of the version 1.1.2 that proposes an interesting scalable ontology storage called IBM SOR. The only version I found available for download now is the version-1.5. However it has a old documentation and I didn't know how to install it :(. Large parts of the system (EODM,SOR..etc) are implemented as an extension to the Eclipse platform. However EODM was terminated referring to this doc. I searched long to find a solution on how installing SOR 1.5 or even get the older version 1.1.2 but I couldn't. I would appreciate any help on how to install/get/use SOR or any information about it (such if it has a new name or new implementation, since it was Minerva before becoming SOR.