Abstract
RDF/OWL as Semantic Web languages espouses open-world and non-unique name assumptions. DB languages have closed-world and unique name assumptions. There is a limit to information processing in closed worlds. We make it clear that RDF/OWL languages are better suited with social sciences than DB languages. Inter-subjectivity is expected to support concepts there. This is consistent with the phenomenological turn. There occur some inconsistencies among signs in their development. Users are assumed as first-person-perspective players who provide knowledge there. This is consistent with the practical turn of social science. RDF/OWL as technology themselves tend to face difficulty in diffusion. However, IS research as social science has potentials to contribute to their development because they are consistent with social sciences.
