The new version of Ontopedia PSI server is out now. It is possible to represent various types of assertions related to subjects (names, occurrences, associations). The new PSI server allows also to record and integrate opinions of different users. Its internal knowledge representation is optimized for paraconsistent reasoning.

I started to play with some topics that I am interested in. For example, Subject-centric Computing , Apple Inc .
As with typical Topic Maps-based system, we can easily add new subject and assertion types, we are not limited by fixed domain models. In addition, the new PSI server supports recording of assertion provenance and five truth values.

We also tried to follow the Resource-Oriented Architecture: each subject, each assertion, each subject-centric group of assertions of the same type has own Uri and “page”.

The main goal of this version is to experiment with assertion level subject-centric representations vs. more traditional portal-based approach.