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This paper lays out the design rationale of RuleML, a rule markup language for the Semantic Web. We give an overview of the RuleML Initiative as a Web ontology effort. Subsequently, the modular syntax and semantics of RuleML and the current RuleML 0.8 DTDs are presented (focusing on the Datalog and URI sublanguages). Then we discuss negation handling,(More)
We present an agent-oriented approach to the conceptual modeling of organizations and organizational information systems, called Agent-ObjectRelationship (AOR) modeling, where an entity is either an agent, an event, an action, a claim, a commitment, or an ordinary object, and where special relationships between agents and events, actions, claims and(More)
We show how a negation operation which allows for the possibility to represent explicit negative information can be added to Protog without essentially altering its computational structure. 1 Background and Aims In [Pearce & Wagner 1989] we have outlined a general approach to the representation and processing of negative information which we believe should(More)
Foundational ontologies provide the basic concepts upon which any domain-specific ontology is built. This paper presents a new foundational ontology, UFO, and shows how it can be used as a guideline in business modeling and for evaluating business modeling methods. UFO is derived from a synthesis of two other foundational ontologies, GFO/GOL and(More)
BACKGROUND The present study is aimed to examine the neuronal correlates of Stroop interference in medication-free patients with major depressive disorder. METHODS Sixteen patients fulfilling Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) criteria for unipolar depression and 16 healthy control subjects matched for age, gender, and(More)
So far, ontologies in the Semantic Web and models in model-driven engineering have been developed mainly in isolation. It seems that due to a lack of communication between communities, modelling concepts have been designed similarly in both paradigms without ensuring their orthogonality. On the long run, this will replicate efforts and cannot be afforded by(More)
As pointed out in the pioneering work of [WSW99,EW01], an upper level ontology allows to evaluate the ontological correctness of a conceptual model and to develop guidelines how the constructs of a conceptual modeling language should be used. In this paper we adopt the General Ontological Language (GOL), proposed in [DHHS01], for this purpose. We discuss a(More)
OBJECTIVE Previous morphometric studies are suggesting altered cortical thickness mainly in prefronto-temporal regions in first episode schizophrenia. In an extension of these earlier studies, we used an entire cortex vertex-wise approach and an automated clustering for the detection and exact quantification of cortical thickness alterations in first(More)