<?xml version="1.0" encoding="UTF-8"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:obo_purl="http://purl.obolibrary.org/obo/" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:metadata_def="http://data.bioontology.org/metadata/def/" xmlns:oboinowl_gen="http://www.geneontology.org/formats/oboInOwl#"> <owl:Class rdf:about="http://purl.obolibrary.org/obo/CHEBI_5631"> <rdfs:subClassOf rdf:resource="http://purl.obolibrary.org/obo/CHEBI_33521"/> <skos:notation>CHEBI:5631</skos:notation> <metadata_def:mappingSameURI rdf:resource="http://purl.obolibrary.org/obo/CHEBI_5631"/> <metadata_def:mappingLoom>heavymetal</metadata_def:mappingLoom> <metadata_def:prefLabel>heavy metal</metadata_def:prefLabel> <obo_purl:IAO_0000115>Any metal that is characterized by its rather high atomic mass and density. Although typically occurring in low concentrations, they can be found all throughout the Earth's crust (Commonly, a density of at least 5 g cm(3) is used to define a heavy metal and to differentiate it from other, ''light'' metals).</obo_purl:IAO_0000115> <oboinowl_gen:hasOBONamespace>chebi_ontology</oboinowl_gen:hasOBONamespace> <oboinowl_gen:hasDbXref>Wikipedia:Heavy_metals</oboinowl_gen:hasDbXref> <rdfs:label>heavy metal</rdfs:label> <oboinowl_gen:id>CHEBI:5631</oboinowl_gen:id> <oboinowl_gen:hasRelatedSynonym>heavy metals</oboinowl_gen:hasRelatedSynonym> <oboinowl_gen:inSubset rdf:resource="http://purl.obolibrary.org/obo/chebi#3_STAR"/> </owl:Class> <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ECTO_9002163"> <obo_purl:RO_0002309> <rdf:Description rdf:about="http://purl.obolibrary.org/obo/CHEBI_5631"> <metadata_def:mappingSameURI rdf:resource="http://purl.obolibrary.org/obo/CHEBI_5631"/> </rdf:Description> </obo_purl:RO_0002309> </rdf:Description> </rdf:RDF>