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International Patent Classification (IPC) Ontology
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ipc:
symbol
http://data.epo.org/linked-data/def/ipc/symbol
rdfs:
subPropertyOf
http://www.w3.org/2000/01/rdf-schema#subPropertyOf
skos:
notation
http://www.w3.org/2004/02/skos/core#notation
graph:
default
https://triplydb.com/none/ipc-ontology/graphs/default