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| nfo:Documentnfo:Document | 
A generic document. A common superclass for all documents on the desktop.
This class emits notifications about changes, and can be tracked through the GraphUpdated DBus signal.
    http://www.w3.org/2000/01/rdf-schema#Resource 
        nie:InformationElement 
        ╰── nfo:Document 
            ├── nfo:TextDocument 
            ├── nfo:Presentation 
            ├── nfo:Spreadsheet 
            ├── nfo:MindMap 
            ├── nfo:Note 
            ╰── nfo:HelpDocument