## Examples of commodity categories: energy commodities that groups electricity, gas, propane (narrower than gas), coal, and natural resource commodities.
ex:EnergyCommodityaowl:Class;
rdfs:subClassOfsaref:Commodity;
rdfs:label"Energy Commodity"@en;
rdfs:comment"The class of energy commodities"@en.
ex:NaturalResourceCommodityaowl:Class;
rdfs:subClassOfsaref:Commodity;
rdfs:label"Natural Resource Commodity"@en;
rdfs:comment"The class of natural resource commodities"@en.
## Example commodities
ex:Electricityaex:EnergyCommodity;
rdfs:comment"The electricity energy commodity"@en;
## SAREF Core defines the category of energy commodities that groups electricity, gas, propane (narrower than gas), coal. It furthermore defines the category of natural resource commodity.
saref:EnergyCommodityaowl:Class;
rdfs:subClassOfsaref:Commodity;
rdfs:label"Energy Commodity"@en;
rdfs:comment"The class of energy commodities"@en;
skos:historyNote"V3.2.1: New category of commodities saref:EnergyCommodity"@en.
saref:NaturalResourceCommodityaowl:Class;
rdfs:subClassOfsaref:Commodity;
rdfs:label"Natural Resource Commodity"@en;
rdfs:comment"The class of natural resource commodities"@en;
skos:historyNote"V3.2.1: New category of commodities saref:NaturalResourceCommodity"@en.
## the following entities will be introduced in the next major revision of SAREF
saref:Electricityasaref:EnergyCommodity;
rdfs:comment"The electricity energy commodity"@en;
rdfs:label"Electricity"@en.
saref:Gasasaref:EnergyCommodity;
rdfs:comment"The gas energy commodity"@en;
rdfs:label"Gas"@en.
saref:Propaneasaref:EnergyCommodity;
skos:broadersaref:Gas;
rdfs:comment"The propane energy commodity"@en;
rdfs:label"Propane"@en.
saref:Coalasaref:EnergyCommodity;
rdfs:comment"The coal energy commodity"@en;
rdfs:label"Coal"@en.
saref:Waterasaref:NaturalResourceCommodity;
rdfs:comment"The water natural resource commodity"@en;