This package contains some suggested interfaces for special types of Identifiers.
 
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Interface Summary
| Interface | Description |  
| DataObjectId | An Identifier which points to a DataObject. |  
| DigitalObjectId | An Identifier which points to a DataObject. |  
| InfoObjectId | An Identifier which points to an InformationObject. |  
| Location | An Identifier which points to the location of an object, which may be a
 physical object.. |  
| RepInfoId | An Identifier which points to a RepresentationInformation Object. |  
| RepInfoNetworkId | An Identifier which points to a RepresentationInformationNetwork Object. |