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| nfo:SoftwareServicenfo:SoftwareService | 
A service published by a piece of software, either by an operating system or an application. Examples of such services may include calendar, addresbook and mailbox managed by a PIM application. This category is introduced to distinguish between data available directly from the applications (Via some Interprocess Communication Mechanisms) and data available from files on a disk. In either case both DataObjects would receive a similar interpretation (e.g. a Mailbox) and wouldn't differ on the content level.
    http://www.w3.org/2000/01/rdf-schema#Resource 
        nie:DataObject 
        ╰── nfo:SoftwareService