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Prefix	Namespace IRI
n4	http://purl.obolibrary.org/obo/
obo	http://www.geneontology.org/formats/oboInOwl#
rdf	http://www.w3.org/1999/02/22-rdf-syntax-ns#
owl	http://www.w3.org/2002/07/owl#
xsdh	http://www.w3.org/2001/XMLSchema#

Subject Item: _:vb1215960
rdf:type: owl:Axiom
obo:hasDbXref: Wikipedia:Permafrost
owl:annotatedProperty: n4:IAO_0000115
owl:annotatedSource: n4:ENVO_00000134
owl:annotatedTarget: Soil at or below the freezing point of water (0C or 32F) for two or more years. Ice is not always present, as may be in the case of nonporous bedrock, but it frequently occurs and it may be in amounts exceeding the potential hydraulic saturation of the ground material.