http://rds.posccaesar.org/2008/02/OWL/ISO-15926-2_2003#Classification
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http://iris.med.duth.gr/research/ecp/ontology/eCP.owl#classification
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LOOM
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http://rds.posccaesar.org/2008/02/OWL/ISO-15926-2_2003#Description
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http://iris.med.duth.gr/research/ecp/ontology/eCP.owl#general_description
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LOOM
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