]> Concepts defined in the original Ontology (external to the project) A namespaced reference to individual Concepts defined in the original Ontology. A URN, which possibly allows to access remotely the concept definition in the original ontology. Context is built on the basis of the original Ontology. It consists of related concepts represented by ConceptRefs, which are considered relevant to the given transformation rule (the exact and full relationship of the Concepts is defined in the original ontology - Context captures just the fact that they are related for the purpose of mapping). A group of one or more Contexts, referring to the same Ontology. A formal expression defining how translation is perfomed between concepts from one ContextSet to those in the other ContextSet. A top-level container for the semantic mapping rules, applicable to a pair of ontologies, as specified by the OntologyRefs. A URN uniquely identifying the referred ontology (possibly allowing to access it remotely). A rule defines how to translate between the concepts in a ContextSet from one Ontology, to the corresponding concepts in a ContextSet from the other ontology. A Rule consists of exactly two ContextSets, each one referring respectively to one of the Ontologies, and a set of Formulas, which define the valid transformations on these ContextSets. ]]>