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The property "vaem:namespace" is the onotlogy URI with which a graph is primarily associated. The intent is to allow multiple graphs to define statements for resources in the same Ontology namespace. For example, a foundation level graph with the base URI of "http://www.somesite.com/1.0/schema/OurOntology" may define general concepts for "OurOntology". Another graph with the base URI "http://www.somesite.com/1.0/schema/level2/OurOntology" may add more specific details to the same "OurOntology". Each of these two graphs would carry the same value for "vaem:namespace", that is, "http://www.somesite.com/schema/OurOntology". In other words, an ontology URI is the URI associated with the resources of a controlled namespace. On the other hand the graph URIs (the base URIs) identify the graphs that hold resources that make up an ontology
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