. _:vb14941 . _:vb14940 _:vb14939 . . . _:vb14938 . _:vb14939 . "The Manufacturer Part Number or MPN is a unique identifier for a product, service, or bundle from the perspective of a particular manufacturer. MPNs can be assigned to products or product datasheets, or bundles. Accordingly, the domain of this property is the union of gr:ProductOrService (the common superclass of goods and datasheets), and gr:Offering.\n\nImportant: Be careful when assuming two products or services instances or offering instances to be identical based on the MPN. Since MPNs are unique only for the same gr:BusinessEntity, this holds only when the two MPN values refer to the same gr:BusinessEntity. Such can be done by taking into account the provenance of the data. \n\nUsually, the properties gr:hasEAN_UCC-13 and gr:hasGTIN-14 are much more reliable identifiers, because they are globally unique.\n\nSee also http://en.wikipedia.org/wiki/Part_number"@en . _:vb14939 . _:vb14938 _:vb14941 . . _:vb14938 . "has MPN (0..*)"@en . _:vb14940 . _:vb14941 _:vb14940 .