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To express how statements in a model can be reifiable, this property is used to explicitly associate a property with a user-defined sub-class of "rdf:Statement". A recommended way of using this is to declare the properties that share the same reification constructs as sub-properties of a parent property that carries the "vaem:reifiableBy" property. The parent property should be of type "rdf:Property" so that it can have both datatype and object properties as sub-properties. By this means use and transformations of a model can be understood through a fully specified metamodel. "vaem:reifiableBy" is rangeless in order to comply with OWL DL semantics. Its range would have been rdfs:Class in order to refer to "rdf:Statement" sub-classes
