Sponging :  disallowed (Read-only view)
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http://purl.org/goodrelations/v1#includes

This object property is a shortcut for the original gr:includesObject property for the common case of having exactly one single gr:ProductOrService instance included in an Offering. It is equivalent to using a gr:TypeAndQuantity node with gr:hasUnitOfMeasurement="C62"^^xsd:string and gr:amountOfThisGood="1.0"^^xsd:float.