|  |  |  | Tracker Ontology Reference Manual |  | 
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Superclass for all elements related with feeds, to provide common configuration options
| 
 | nie:InformationElement, | 
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 | mfo:Enclosure, mfo:FeedMessage, mfo:FeedChannel, | 
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 | mfo:feedSettings, mfo:image, | 
| 
 | -- | 
class with a restricted set of actions
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 | rdfs:Resource, | 
| 
 | -- | 
| 
 | -- | 
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 | mfo:action, | 
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 | mfo:refresh-now, | 
Represents settings applied to a feed channel or a feed entry. How often it is updated, through which connection type it is delivered, when data expires and so on
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 | rdfs:Resource, | 
| 
 | -- | 
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 | mfo:maxSize, mfo:downloadFlag, mfo:downloadPath, mfo:expiryInterval, mfo:updateInterval, | 
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 | mfo:feedSettings, | 
Represents an enclosure of a feed message
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 | mfo:FeedElement, | 
| 
 | -- | 
| 
 | mfo:optional, mfo:localLink, mfo:groupDefault, mfo:remoteLink, | 
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 | mfo:enclosureList, | 
This class notifies about changes
Represents feed entry on top of Nepomuk Messaging Ontology's message. May have enclosures attached and certain settings that allow deviation from feed channel's setup
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 | mfo:FeedElement, nmo:Message, | 
| 
 | -- | 
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 | mfo:enclosureList, mfo:downloadedTime, | 
| 
 | -- | 
This class notifies about changes
Represents feed channel transfer, typically a download of RSS or ATOM. It is also a communication channel of Nepomuk Messaging Ontology so that feed sources could be treated as message sources
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 | mfo:FeedElement, nmo:CommunicationChannel, | 
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 | -- | 
| 
 | mfo:type, mfo:action, mfo:totalCount, mfo:unreadCount, mfo:updatedTime, | 
| 
 | -- | 
This class notifies about changes