PROTON is split into 4 modules, which can be accessed as follows:

• PROTON System module: http://proton.semanticweb.org/2004/12/protons
• PROTON Top module: http://proton.semanticweb.org/2004/12/protont
• PROTON Upper module: http://proton.semanticweb.org/2004/12/protonu

New! The PROTON Knowledge Management ontology is the new, fourth module, already part of PROTON. This ontology module is actually the SEKT-specific domain ontology (former SKULO - SEKT Knowledge Management Upper Level Ontology), that has been integrated in PROTON for easier management and consistency. It is only dependent on the System and Top modules and not on the Upper module. It can be accessed at the following URL:

• PROTON Knowledge Management module: http://proton.semanticweb.org/2004/12/protonkm