Changelog/20100727

=Changelog: Service Update July 27, 2010=

July 27, 2010: Service Update - Minor extensions and improvements, part V
In this service update, we added a few additional elements that have turned out to be useful in some scenarios and which are of generic interest. They should thus be part of the core ontology and not be defined in industry-specific complementing ontologies. The service update is fully backwards-compatible with previous releases.


 * 1) Added gr:hasMPN (0..*)
 * 2) *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.
 * 3) *See also http://en.wikipedia.org/wiki/Part_number
 * 4) Changed the text of gr:hasStockKeepingUnit slightly in order to differentiate from hasMPN
 * 5) Added gr:valueReference (0..*)
 * 6) *The superclass of properties that link a Quantitative Value or a Qualitative Value to a secondary Quantitative Value or a Qualitative Value that provides additional information on the original value. A good modeling practice is to define specializations of this property (e.g. foo:referenceTemperature) for your particular domain.
 * 7) Added gr:addOn (0..*)
 * 8) *This property points from an Offering to additional Offerings that can only be obtained in combination with the first Offering. This can be used to model supplements and extensions that are available for a surcharge. Any Price Specification attached to the secondary Offering is to be understood as an additional charge.
 * 9) Added gr:Offering to the range of gr:hasEligibleQuantity
 * 10) *Also updated the text for gr:hasEligibleQuantity accordingly.