About files and other desktop resources.

@prefix nfo: <http://tracker.api.gnome.org/ontology/v3/nfo#>

The following classes are defined:

Application, Archive, ArchiveItem, Attachment, Audio, Bookmark, BookmarkFolder, CompressionType, Cursor, DataContainer, DeletedResource, Document, EBook, EmbeddedFileDataObject, Equipment, Executable, FileDataObject, FileHash, Filesystem, FilesystemImage, Folder, Font, GameImage, HardDiskPartition, HelpDocument, HtmlDocument, Icon, Image, ImageCategory, Media, MediaFileListEntry, MediaList, MediaStream, MindMap, Note, OperatingSystem, Orientation, PaginatedTextDocument, PlainTextDocument, Presentation, RasterImage, RegionOfInterest, RegionOfInterestContent, RemoteDataObject, RemotePortAddress, Software, SoftwareApplication, SoftwareCategory, SoftwareItem, SoftwareService, SourceCode, Spreadsheet, TextDocument, Trash, VectorImage, Video, Visual, WebHistory, Website

Classes

Application

An application

Class hierarchy

G nfo:Application nfo:Application nfo:Software nfo:Software nfo:Software--nfo:Application nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Software rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Archive

A compressed file. May contain other files or folder inside.

Class hierarchy

G nfo:Archive nfo:Archive nfo:DataContainer nfo:DataContainer nfo:DataContainer--nfo:Archive nie:InformationElement nie:InformationElement nie:InformationElement--nfo:DataContainer rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Properties

Name Type Notes Description
uncompressedSize integer Uncompressed size of the content of a compressed file.

ArchiveItem

A file entity inside an archive.

Class hierarchy

G nfo:ArchiveItem nfo:ArchiveItem nfo:EmbeddedFileDataObject nfo:EmbeddedFileDataObject nfo:EmbeddedFileDataObject--nfo:ArchiveItem nfo:FileDataObject nfo:FileDataObject nfo:FileDataObject--nfo:EmbeddedFileDataObject nie:DataObject nie:DataObject nie:DataObject--nfo:FileDataObject rdfs:Resource rdfs:Resource rdfs:Resource--nie:DataObject

Properties

Name Type Notes Description
isPasswordProtected boolean States if a given resource is password-protected.

Attachment

A file attached to another data object. Many data formats allow for attachments: emails, vcards, ical events, id3 and exif…

Class hierarchy

G nfo:Attachment nfo:Attachment nfo:EmbeddedFileDataObject nfo:EmbeddedFileDataObject nfo:EmbeddedFileDataObject--nfo:Attachment nfo:FileDataObject nfo:FileDataObject nfo:FileDataObject--nfo:EmbeddedFileDataObject nie:DataObject nie:DataObject nie:DataObject--nfo:FileDataObject rdfs:Resource rdfs:Resource rdfs:Resource--nie:DataObject

Audio

A file containing audio content

Note: This class emits notifications about changes, and can be monitored using TrackerNotifier.

Class hierarchy

G nfo:Audio nfo:Audio nmm:RadioStation nmm:RadioStation nfo:Audio--nmm:RadioStation nmm:Video nmm:Video nfo:Audio--nmm:Video nfo:Media nfo:Media nfo:Media--nfo:Audio nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Media rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Properties

Name Type Notes Description
audioOffset double Specifies the start offset of this resource within a larger file, such as a single song within a recording of a radio broadcast or a CD rip.
averageAudioBitrate double The average overall bitrate of a media container. (i.e. the size of the piece of media in bits, divided by it’s duration expressed in seconds).
bitsPerSample integer Amount of bits in each audio sample.
channels integer Number of channels. This property is to be used directly if no detailed information is necessary. Otherwise use more detailed subproperties.
frontChannels integer Number of front channels.
gain integer Gain of media
lfeChannels integer Number of Low Frequency Expansion (subwoofer) channels.
peakGain integer Peak Gain of media
rearChannels integer Number of rear channels.
sampleCount integer The amount of samples in an audio clip.
sampleRate double The amount of audio samples per second.
sideChannels integer Number of side channels

Bookmark

A bookmark of a webbrowser. Use nie:title for the name/label, nie:contentCreated to represent the date when the user added the bookmark, and nie:contentLastModified for modifications. nfo:bookmarks to store the link.

Note: This class emits notifications about changes, and can be monitored using TrackerNotifier.

Class hierarchy

G nfo:Bookmark nfo:Bookmark nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Bookmark rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:Bookmark nfo:Bookmark nie:DataObject nie:DataObject nfo:Bookmark->nie:DataObject nfo:bookmarks nfo:BookmarkFolder nfo:BookmarkFolder nfo:BookmarkFolder->nfo:Bookmark nfo:containsBookmark

Properties

Name Type Notes Description
bookmarks DataObject The address of the linked object. Usually a web URL.
characterPosition integer Character position of the bookmark
pageNumber integer Page linked by the bookmark
streamDuration integer
streamPosition integer Stream position of the bookmark, suitable for e.g. audio books. Expressed in milliseconds

BookmarkFolder

A folder with bookmarks of a webbrowser. Use nfo:containsBookmark to relate Bookmarks. Folders can contain subfolders, use containsBookmarkFolder to relate them.

Note: This class emits notifications about changes, and can be monitored using TrackerNotifier.

Class hierarchy

G nfo:BookmarkFolder nfo:BookmarkFolder nie:InformationElement nie:InformationElement nie:InformationElement--nfo:BookmarkFolder rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:BookmarkFolder nfo:BookmarkFolder nfo:BookmarkFolder->nfo:BookmarkFolder nfo:containsBookmarkFolder nfo:Bookmark nfo:Bookmark nfo:BookmarkFolder->nfo:Bookmark nfo:containsBookmark

Properties

Name Type Notes Description
containsBookmark Bookmark The folder contains a bookmark.
containsBookmarkFolder BookmarkFolder The folder contains a bookmark folder.

CompressionType

Type of compression. Instances of this class represent the limited set of values allowed for the nfo:compressionType property.

Class hierarchy

G nfo:CompressionType nfo:CompressionType rdfs:Resource rdfs:Resource rdfs:Resource--nfo:CompressionType

RDF Diagram

G nfo:CompressionType nfo:CompressionType nfo:Media nfo:Media nfo:Media->nfo:CompressionType nfo:compressionType

Cursor

A Cursor.

Class hierarchy

G nfo:Cursor nfo:Cursor nfo:RasterImage nfo:RasterImage nfo:RasterImage--nfo:Cursor nfo:Image nfo:Image nfo:Image--nfo:RasterImage nfo:Visual nfo:Visual nfo:Visual--nfo:Image nfo:Media nfo:Media nfo:Media--nfo:Visual nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Media rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

DataContainer

A superclass for all entities, whose primary purpose is to serve as containers for other data object. They usually don’t have any ‘meaning’ by themselves. Examples include folders, archives and optical disc images.

Note: This class emits notifications about changes, and can be monitored using TrackerNotifier.

Class hierarchy

G nfo:DataContainer nfo:DataContainer nfo:Archive nfo:Archive nfo:DataContainer--nfo:Archive nfo:Filesystem nfo:Filesystem nfo:DataContainer--nfo:Filesystem nfo:Folder nfo:Folder nfo:DataContainer--nfo:Folder nfo:ImageCategory nfo:ImageCategory nfo:DataContainer--nfo:ImageCategory nfo:SoftwareCategory nfo:SoftwareCategory nfo:DataContainer--nfo:SoftwareCategory nfo:Trash nfo:Trash nfo:DataContainer--nfo:Trash nie:InformationElement nie:InformationElement nie:InformationElement--nfo:DataContainer rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:DataContainer nfo:DataContainer nie:DataObject nie:DataObject nie:DataObject->nfo:DataContainer nfo:belongsToContainer

Predefined instances

nfo:DataContainer has the following predefined instances:

  • nfo:image-category-screenshot

DeletedResource

A file entity that has been deleted from the original source. Usually such entities are stored within various kinds of ‘Trash’ or ‘Recycle Bin’ folders.

Class hierarchy

G nfo:DeletedResource nfo:DeletedResource nfo:FileDataObject nfo:FileDataObject nfo:FileDataObject--nfo:DeletedResource nie:DataObject nie:DataObject nie:DataObject--nfo:FileDataObject rdfs:Resource rdfs:Resource rdfs:Resource--nie:DataObject

Properties

Name Type Notes Description
deletionDate dateTime The date and time of the deletion.
originalLocation string The original location of the deleted resource.

Document

A generic document. A common superclass for all documents on the desktop.

Note: This class emits notifications about changes, and can be monitored using TrackerNotifier.

Class hierarchy

G nfo:Document nfo:Document nfo:HelpDocument nfo:HelpDocument nfo:Document--nfo:HelpDocument nfo:MindMap nfo:MindMap nfo:Document--nfo:MindMap nfo:Note nfo:Note nfo:Document--nfo:Note nfo:Presentation nfo:Presentation nfo:Document--nfo:Presentation nfo:Spreadsheet nfo:Spreadsheet nfo:Document--nfo:Spreadsheet nfo:TextDocument nfo:TextDocument nfo:Document--nfo:TextDocument nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Properties

Name Type Notes Description
tableOfContents string Section titles and figure descriptions of the document.

EBook

Books which can be electronically viewed

Class hierarchy

G nfo:EBook nfo:EBook nfo:PaginatedTextDocument nfo:PaginatedTextDocument nfo:PaginatedTextDocument--nfo:EBook nfo:TextDocument nfo:TextDocument nfo:TextDocument--nfo:PaginatedTextDocument nfo:Document nfo:Document nfo:Document--nfo:TextDocument nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

EmbeddedFileDataObject

A file embedded in another data object. There are many ways in which a file may be embedded in another one. Use this class directly only in cases if none of the subclasses gives a better description of your case.

Class hierarchy

G nfo:EmbeddedFileDataObject nfo:EmbeddedFileDataObject nfo:ArchiveItem nfo:ArchiveItem nfo:EmbeddedFileDataObject--nfo:ArchiveItem nfo:Attachment nfo:Attachment nfo:EmbeddedFileDataObject--nfo:Attachment nfo:FileDataObject nfo:FileDataObject nfo:FileDataObject--nfo:EmbeddedFileDataObject nie:DataObject nie:DataObject nie:DataObject--nfo:FileDataObject rdfs:Resource rdfs:Resource rdfs:Resource--nie:DataObject

Properties

Name Type Notes Description
encoding string The encoding used for the Embedded File. Examples might include BASE64 or UUEncode

Equipment

The equipment used to create media

Class hierarchy

G nfo:Equipment nfo:Equipment nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Equipment rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:Equipment nfo:Equipment nfo:Media nfo:Media nfo:Media->nfo:Equipment nfo:equipment

Properties

Name Type Notes Description
equipmentSoftware string The software of the equipment
manufacturer string The manufacturer of the equipment
model string The model of the equipment

Executable

An executable file.

Class hierarchy

G nfo:Executable nfo:Executable nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Executable rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

FileDataObject

A resource containing a finite sequence of bytes with arbitrary information, that is available to a computer program and is usually based on some kind of durable storage. A file is durable in the sense that it remains available for programs to use after the current program has finished.

Note: This class emits notifications about changes, and can be monitored using TrackerNotifier.

Class hierarchy

G nfo:FileDataObject nfo:FileDataObject nfo:DeletedResource nfo:DeletedResource nfo:FileDataObject--nfo:DeletedResource nfo:EmbeddedFileDataObject nfo:EmbeddedFileDataObject nfo:FileDataObject--nfo:EmbeddedFileDataObject nfo:RemoteDataObject nfo:RemoteDataObject nfo:FileDataObject--nfo:RemoteDataObject nie:DataObject nie:DataObject nie:DataObject--nfo:FileDataObject rdfs:Resource rdfs:Resource rdfs:Resource--nie:DataObject

RDF Diagram

G nfo:FileDataObject nfo:FileDataObject nco:Contact nco:Contact nfo:FileDataObject->nco:Contact nfo:fileOwner nfo:FileHash nfo:FileHash nfo:FileDataObject->nfo:FileHash nfo:hasHash mfo:Enclosure mfo:Enclosure mfo:Enclosure->nfo:FileDataObject mfo:localLink

Properties

Name Type Notes Description
fileCreated dateTime File creation date
fileLastAccessed dateTime Time when the file was last accessed.
fileLastModified dateTime last modification date
fileName string Name of the file, together with the extension
fileOwner Contact The owner of the file as defined by the file system access rights feature.
fileSize integer The size of the file in bytes. For compressed files it means the size of the packed file, not of the contents. For folders it means the aggregated size of all contained files and folders
hasHash FileHash Links the file with it’s hash value.
permissions string A string containing the permissions of a file. A feature common in many UNIX-like operating systems.
extractorHash string Hash identifying the extractor of the metadata

FileHash

A fingerprint of the file, generated by some hashing function.

Class hierarchy

G nfo:FileHash nfo:FileHash rdfs:Resource rdfs:Resource rdfs:Resource--nfo:FileHash

RDF Diagram

G nfo:FileHash nfo:FileHash nfo:FileDataObject nfo:FileDataObject nfo:FileDataObject->nfo:FileHash nfo:hasHash

Properties

Name Type Notes Description
hashAlgorithm string Name of the algorithm used to compute the hash value. Examples might include CRC32, MD5, SHA, TTH etc.
hashValue string The actual value of the hash.

Filesystem

A filesystem. Examples of filesystems include hard disk partitions, removable media, but also images thereof stored in files.

Class hierarchy

G nfo:Filesystem nfo:Filesystem nfo:FilesystemImage nfo:FilesystemImage nfo:Filesystem--nfo:FilesystemImage nfo:DataContainer nfo:DataContainer nfo:DataContainer--nfo:Filesystem nie:InformationElement nie:InformationElement nie:InformationElement--nfo:DataContainer rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

FilesystemImage

An image of a filesystem. Instances of this class may include CD images, DVD images or hard disk partition images created by various pieces of software (e.g. Norton Ghost)

Class hierarchy

G nfo:FilesystemImage nfo:FilesystemImage nfo:Filesystem nfo:Filesystem nfo:Filesystem--nfo:FilesystemImage nfo:DataContainer nfo:DataContainer nfo:DataContainer--nfo:Filesystem nie:InformationElement nie:InformationElement nie:InformationElement--nfo:DataContainer rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Folder

A folder/directory. Examples of folders include folders on a filesystem and message folders in a mailbox.

Class hierarchy

G nfo:Folder nfo:Folder tracker:IndexedFolder tracker:IndexedFolder nfo:Folder--tracker:IndexedFolder nfo:DataContainer nfo:DataContainer nfo:DataContainer--nfo:Folder nie:InformationElement nie:InformationElement nie:InformationElement--nfo:DataContainer rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Font

A font.

Class hierarchy

G nfo:Font nfo:Font nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Font rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:Font nfo:Font nco:Contact nco:Contact nfo:Font->nco:Contact nfo:foundry

Properties

Name Type Notes Description
fontFamily string The name of the font family.
foundry Contact The foundry, the organization that created the font.

GameImage

A game image. This is a Tracker extension

Class hierarchy

G nfo:GameImage nfo:GameImage nfo:SoftwareApplication nfo:SoftwareApplication nfo:SoftwareApplication--nfo:GameImage nfo:Software nfo:Software nfo:Software--nfo:SoftwareApplication nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Software rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

HardDiskPartition

A partition on a hard disk

Class hierarchy

G nfo:HardDiskPartition nfo:HardDiskPartition nie:DataObject nie:DataObject nie:DataObject--nfo:HardDiskPartition rdfs:Resource rdfs:Resource rdfs:Resource--nie:DataObject

HelpDocument

User guides and similar to assist the user

Class hierarchy

G nfo:HelpDocument nfo:HelpDocument nfo:Document nfo:Document nfo:Document--nfo:HelpDocument nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

HtmlDocument

A HTML document, may contain links to other files.

Class hierarchy

G nfo:HtmlDocument nfo:HtmlDocument nfo:PlainTextDocument nfo:PlainTextDocument nfo:PlainTextDocument--nfo:HtmlDocument nfo:TextDocument nfo:TextDocument nfo:TextDocument--nfo:PlainTextDocument nfo:Document nfo:Document nfo:Document--nfo:TextDocument nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Icon

An Icon (regardless of whether it’s a raster or a vector icon. A resource representing an icon could have two types (Icon and Raster, or Icon and Vector) if required.

Class hierarchy

G nfo:Icon nfo:Icon nfo:Image nfo:Image nfo:Image--nfo:Icon nfo:Visual nfo:Visual nfo:Visual--nfo:Image nfo:Media nfo:Media nfo:Media--nfo:Visual nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Media rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Image

A file containing an image.

Note: This class emits notifications about changes, and can be monitored using TrackerNotifier.

Class hierarchy

G nfo:Image nfo:Image nfo:Icon nfo:Icon nfo:Image--nfo:Icon nfo:RasterImage nfo:RasterImage nfo:Image--nfo:RasterImage nfo:VectorImage nfo:VectorImage nfo:Image--nfo:VectorImage nmm:Photo nmm:Photo nfo:Image--nmm:Photo nfo:Visual nfo:Visual nfo:Visual--nfo:Image nfo:Media nfo:Media nfo:Media--nfo:Visual nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Media rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:Image nfo:Image rdfs:Resource rdfs:Resource nfo:Image->rdfs:Resource nfo:depicts nfo:RegionOfInterest nfo:RegionOfInterest nfo:Image->nfo:RegionOfInterest nfo:hasRegionOfInterest nfo:Orientation nfo:Orientation nfo:Image->nfo:Orientation nfo:orientation rdfs:Resource->nfo:Image nfo:depiction nfo:SoftwareCategory nfo:SoftwareCategory nfo:SoftwareCategory->nfo:Image nfo:softwareCategoryIcon nfo:Software nfo:Software nfo:Software->nfo:Image nfo:softwareIcon nfo:Media nfo:Media nfo:Media->nfo:Image nmm:artwork nmm:RadioStation nmm:RadioStation nmm:RadioStation->nfo:Image nmm:radioIcon

Properties

Name Type Notes Description
depicts Resource Relates an image to the information elements it depicts.
hasRegionOfInterest RegionOfInterest Link an element with a defined region
horizontalResolution integer Horizontal resolution of an image (if printed). Expressed in DPI.
orientation Orientation
verticalResolution integer Vertical resolution of an Image (if printed). Expressed in DPI

ImageCategory

A image category

Class hierarchy

G nfo:ImageCategory nfo:ImageCategory nfo:DataContainer nfo:DataContainer nfo:DataContainer--nfo:ImageCategory nie:InformationElement nie:InformationElement nie:InformationElement--nfo:DataContainer rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Predefined instances

nfo:ImageCategory has the following predefined instances:

  • nfo:image-category-screenshot

Media

A piece of media content. This class may be used to express complex media containers with many streams of various media content (both aural and visual).

Class hierarchy

G nfo:Media nfo:Media nfo:Audio nfo:Audio nfo:Media--nfo:Audio nfo:Visual nfo:Visual nfo:Media--nfo:Visual nmm:Movie nmm:Movie nfo:Media--nmm:Movie nmm:MusicPiece nmm:MusicPiece nfo:Media--nmm:MusicPiece nmm:TVShow nmm:TVShow nfo:Media--nmm:TVShow nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Media rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:Media nfo:Media nfo:Media->nfo:Media nmm:alternativeMedia nfo:CompressionType nfo:CompressionType nfo:Media->nfo:CompressionType nfo:compressionType nfo:Equipment nfo:Equipment nfo:Media->nfo:Equipment nfo:equipment nie:DataObject nie:DataObject nfo:Media->nie:DataObject nfo:hasMediaStream nfo:Image nfo:Image nfo:Media->nfo:Image nmm:artwork

Properties

Name Type Notes Description
averageBitrate double The average overall bitrate of a media container. (i.e. the size of the piece of media in bits, divided by it’s duration expressed in seconds).
bitDepth Literal A common superproperty for all properties signifying the amount of bits for an atomic unit of data. Examples of subproperties may include bitsPerSample and bitsPerPixel
bitrateType string The type of the bitrate. Examples may include CBR and VBR.
codec string The name of the codec necessary to decode a piece of media.
compressionType CompressionType The type of the compression. Values include, lossy and lossless.
count integer A common superproperty for all properties signifying the amount of atomic media data units. Examples of subproperties may include sampleCount and frameCount.
duration integer Duration of a media piece, measured in seconds.
encodedBy string The contains the name of the person or organisation that encoded the media
equipment Equipment Equipment used to create the media
genre string Genre of media
hasMediaStream DataObject Connects a media container with a single media stream contained within.
lastPlayedPosition integer Position in the media (in seconds) where the play was paused. Positive number, being 0 the beginning of the media.
alternativeMedia Media Link between to different version of the same media. This is used for instances in uPnp where the server can provide the same video in different resolutions and codecs
artwork Image Associated Artwork
dlnaMime string Mimetypes as defined for DLNA (occasional differences compared to xdg-mime)
dlnaProfile string DLNA profile of the content, like MP3, MPEG_TS_HD_US, LPCM etc
genre string
skipCounter integer
uPnPShared boolean Tells the uPnP MediaServer (e.g. Rygel) whether to export/share the resource or not

MediaFileListEntry

A single node in the list of media files contained within an MediaList instance. This class is intended to provide a type all those links have. In valid NRL untyped resources cannot be linked. There are no properties defined for this class but the application may expect rdf:first and rdf:last links. The former points to the DataObject instance, interpreted as Media the latter points at another MediaFileListEntr. At the end of the list there is a link to rdf:nil.

Class hierarchy

G nfo:MediaFileListEntry nfo:MediaFileListEntry rdfs:Resource rdfs:Resource rdfs:Resource--nfo:MediaFileListEntry

RDF Diagram

G nfo:MediaFileListEntry nfo:MediaFileListEntry nfo:MediaList nfo:MediaList nfo:MediaList->nfo:MediaFileListEntry nfo:hasMediaFileListEntry

Properties

Name Type Notes Description
entryUrl string URL to the element in certain position of the list
listPosition double Position of an entry in a list. Double, to optimize the poor insertions

MediaList

A file containing a list of media files.e.g. a playlist

Class hierarchy

G nfo:MediaList nfo:MediaList nmm:ImageList nmm:ImageList nfo:MediaList--nmm:ImageList nmm:MusicAlbum nmm:MusicAlbum nfo:MediaList--nmm:MusicAlbum nmm:Playlist nmm:Playlist nfo:MediaList--nmm:Playlist nie:InformationElement nie:InformationElement nie:InformationElement--nfo:MediaList rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:MediaList nfo:MediaList nfo:MediaFileListEntry nfo:MediaFileListEntry nfo:MediaList->nfo:MediaFileListEntry nfo:hasMediaFileListEntry nie:InformationElement nie:InformationElement nfo:MediaList->nie:InformationElement nfo:mediaListEntry

Properties

Name Type Notes Description
entryCounter integer Number of entries in the list. Optimize some common queries
hasMediaFileListEntry MediaFileListEntry This property is intended to point to an RDF list of MediaFiles.
listDuration integer Sum of the duration of all items in the list. Optimize some common queries. In seconds
mediaListEntry InformationElement A certain item belongs to a media list. This can reflect that a song is in a playlist, an image or video in an Album

MediaStream

A stream of multimedia content, usually contained within a media container such as a movie (containing both audio and video) or a DVD (possibly containing many streams of audio and video). Most common interpretations for such a DataObject include Audio and Video.

Class hierarchy

G nfo:MediaStream nfo:MediaStream nmm:AnalogRadio nmm:AnalogRadio nfo:MediaStream--nmm:AnalogRadio nmm:DigitalRadio nmm:DigitalRadio nfo:MediaStream--nmm:DigitalRadio nie:DataObject nie:DataObject nie:DataObject--nfo:MediaStream rdfs:Resource rdfs:Resource rdfs:Resource--nie:DataObject

RDF Diagram

G nfo:MediaStream nfo:MediaStream nmm:RadioStation nmm:RadioStation nmm:RadioStation->nfo:MediaStream nmm:carrier

MindMap

A MindMap, created by a mind-mapping utility. Examples might include FreeMind or mind mapper.

Class hierarchy

G nfo:MindMap nfo:MindMap nfo:Document nfo:Document nfo:Document--nfo:MindMap nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Note

Usually small document with snippets, reminders or frequenly used content.

Class hierarchy

G nfo:Note nfo:Note nfo:Document nfo:Document nfo:Document--nfo:Note nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

OperatingSystem

An OperatingSystem

Class hierarchy

G nfo:OperatingSystem nfo:OperatingSystem osinfo:Installer osinfo:Installer nfo:OperatingSystem--osinfo:Installer nfo:Software nfo:Software nfo:Software--nfo:OperatingSystem nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Software rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Orientation

Orientation enum

Class hierarchy

G nfo:Orientation nfo:Orientation rdfs:Resource rdfs:Resource rdfs:Resource--nfo:Orientation

RDF Diagram

G nfo:Orientation nfo:Orientation nfo:Image nfo:Image nfo:Image->nfo:Orientation nfo:orientation

Predefined instances

nfo:Orientation has the following predefined instances:

  • nfo:orientation-left
  • nfo:orientation-right-mirror
  • nfo:orientation-right
  • nfo:orientation-left-mirror
  • nfo:orientation-bottom-mirror
  • nfo:orientation-bottom
  • nfo:orientation-top-mirror
  • nfo:orientation-top

PaginatedTextDocument

A file containing a text document, that is unambiguously divided into pages. Examples might include PDF, DOC, PS’, DVI etc.

Class hierarchy

G nfo:PaginatedTextDocument nfo:PaginatedTextDocument nfo:EBook nfo:EBook nfo:PaginatedTextDocument--nfo:EBook nfo:TextDocument nfo:TextDocument nfo:TextDocument--nfo:PaginatedTextDocument nfo:Document nfo:Document nfo:Document--nfo:TextDocument nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Properties

Name Type Notes Description
pageCount integer Number of pages.

PlainTextDocument

A file containing plain text (ASCII, Unicode or other encodings). Examples may include TXT, HTML, XML, program source code etc.

Class hierarchy

G nfo:PlainTextDocument nfo:PlainTextDocument nfo:HtmlDocument nfo:HtmlDocument nfo:PlainTextDocument--nfo:HtmlDocument nfo:SourceCode nfo:SourceCode nfo:PlainTextDocument--nfo:SourceCode nmm:SynchronizedText nmm:SynchronizedText nfo:PlainTextDocument--nmm:SynchronizedText nfo:TextDocument nfo:TextDocument nfo:TextDocument--nfo:PlainTextDocument nfo:Document nfo:Document nfo:Document--nfo:TextDocument nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Presentation

A Presentation made by some presentation software (Corel Presentations, OpenOffice Impress, MS Powerpoint etc.)

Class hierarchy

G nfo:Presentation nfo:Presentation nfo:Document nfo:Document nfo:Document--nfo:Presentation nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RasterImage

A raster image.

Class hierarchy

G nfo:RasterImage nfo:RasterImage nfo:Cursor nfo:Cursor nfo:RasterImage--nfo:Cursor nfo:Image nfo:Image nfo:Image--nfo:RasterImage nfo:Visual nfo:Visual nfo:Visual--nfo:Image nfo:Media nfo:Media nfo:Media--nfo:Visual nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Media rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RegionOfInterest

Area on an image with relevant content. Following the spec in http://www.metadataworkinggroup.org

Class hierarchy

G nfo:RegionOfInterest nfo:RegionOfInterest nie:InformationElement nie:InformationElement nie:InformationElement--nfo:RegionOfInterest rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:RegionOfInterest nfo:RegionOfInterest nfo:RegionOfInterestContent nfo:RegionOfInterestContent nfo:RegionOfInterest->nfo:RegionOfInterestContent nfo:regionOfInterestType nie:InformationElement nie:InformationElement nfo:RegionOfInterest->nie:InformationElement nfo:roiRefersTo nfo:Image nfo:Image nfo:Image->nfo:RegionOfInterest nfo:hasRegionOfInterest

Properties

Name Type Notes Description
regionOfInterestHeight double Height of the region. It is normalized (values between 0 and 1) to the total height of the picture.
regionOfInterestType RegionOfInterestContent The content of a region can be one of the predefined types in the spec
regionOfInterestWidth double Width of the region. It is normalized (values between 0 and 1) to the total width of the picture.
regionOfInterestX double Coordinate X where the region starts. It is normalized (values between 0 and 1) to the width of the picture. Starting in the upper left corner.
regionOfInterestY double Coordinate y where the region starts. It is normalized (values between 0 and 1) to the height of the picture. Starting in the upper left corner.
roiRefersTo InformationElement Link to an item that is represented in the region. The ‘type’ of the region can give a clue of what exact content is linked in this property

RegionOfInterestContent

Content in the area. There is a predefined set of contents in the spec: http://www.metadataworkinggroup.org

Class hierarchy

G nfo:RegionOfInterestContent nfo:RegionOfInterestContent nie:InformationElement nie:InformationElement nie:InformationElement--nfo:RegionOfInterestContent rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:RegionOfInterestContent nfo:RegionOfInterestContent nfo:RegionOfInterest nfo:RegionOfInterest nfo:RegionOfInterest->nfo:RegionOfInterestContent nfo:regionOfInterestType

Predefined instances

nfo:RegionOfInterestContent has the following predefined instances:

  • nfo:roi-content-undefined
  • nfo:roi-content-barcode
  • nfo:roi-content-focus
  • nfo:roi-content-pet
  • nfo:roi-content-face

RemoteDataObject

A file data object stored at a remote location. Don’t confuse this class with a RemotePortAddress. This one applies to a particular resource, RemotePortAddress applies to an address, that can have various interpretations.

Class hierarchy

G nfo:RemoteDataObject nfo:RemoteDataObject nfo:FileDataObject nfo:FileDataObject nfo:FileDataObject--nfo:RemoteDataObject nie:DataObject nie:DataObject nie:DataObject--nfo:FileDataObject rdfs:Resource rdfs:Resource rdfs:Resource--nie:DataObject

RDF Diagram

G nfo:RemoteDataObject nfo:RemoteDataObject mfo:Enclosure mfo:Enclosure mfo:Enclosure->nfo:RemoteDataObject mfo:remoteLink

RemotePortAddress

An address specifying a remote host and port. Such an address can be interpreted in many ways (examples of such interpretations include mailboxes, websites, remote calendars or filesystems), depending on an interpretation, various kinds of data may be extracted from such an address.

Class hierarchy

G nfo:RemotePortAddress nfo:RemotePortAddress nie:DataObject nie:DataObject nie:DataObject--nfo:RemotePortAddress rdfs:Resource rdfs:Resource rdfs:Resource--nie:DataObject

Software

A piece of software. Examples may include applications and the operating system. This interpretation most commonly applies to SoftwareItems.

Class hierarchy

G nfo:Software nfo:Software nfo:Application nfo:Application nfo:Software--nfo:Application nfo:OperatingSystem nfo:OperatingSystem nfo:Software--nfo:OperatingSystem nfo:SoftwareApplication nfo:SoftwareApplication nfo:Software--nfo:SoftwareApplication nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Software rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:Software nfo:Software nfo:Software->nfo:Software nfo:conflicts nfo:Software->nfo:Software nfo:supercedes nfo:Image nfo:Image nfo:Software->nfo:Image nfo:softwareIcon

Properties

Name Type Notes Description
conflicts Software States that a piece of software is in conflict with another piece of software.
softwareCmdLine string Command to launch the software
softwareIcon Image Icon of the software
supercedes Software States that a piece of software supercedes another piece of software.

SoftwareApplication

An application

Note: This class emits notifications about changes, and can be monitored using TrackerNotifier.

Class hierarchy

G nfo:SoftwareApplication nfo:SoftwareApplication nfo:GameImage nfo:GameImage nfo:SoftwareApplication--nfo:GameImage nfo:Software nfo:Software nfo:Software--nfo:SoftwareApplication nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Software rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

SoftwareCategory

A software category

Class hierarchy

G nfo:SoftwareCategory nfo:SoftwareCategory nfo:DataContainer nfo:DataContainer nfo:DataContainer--nfo:SoftwareCategory nie:InformationElement nie:InformationElement nie:InformationElement--nfo:SoftwareCategory nie:InformationElement--nfo:DataContainer rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

RDF Diagram

G nfo:SoftwareCategory nfo:SoftwareCategory nfo:Image nfo:Image nfo:SoftwareCategory->nfo:Image nfo:softwareCategoryIcon

Properties

Name Type Notes Description
softwareCategoryIcon Image Icon of the software

SoftwareItem

A DataObject representing a piece of software. Examples of interpretations of a SoftwareItem include an Application and an OperatingSystem.

Class hierarchy

G nfo:SoftwareItem nfo:SoftwareItem nie:DataObject nie:DataObject nie:DataObject--nfo:SoftwareItem rdfs:Resource rdfs:Resource rdfs:Resource--nie:DataObject

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.

Class hierarchy

G nfo:SoftwareService nfo:SoftwareService nie:DataObject nie:DataObject nie:DataObject--nfo:SoftwareService rdfs:Resource rdfs:Resource rdfs:Resource--nie:DataObject

SourceCode

Code in a compilable or interpreted programming language.

Class hierarchy

G nfo:SourceCode nfo:SourceCode nfo:PlainTextDocument nfo:PlainTextDocument nfo:PlainTextDocument--nfo:SourceCode nfo:TextDocument nfo:TextDocument nfo:TextDocument--nfo:PlainTextDocument nfo:Document nfo:Document nfo:Document--nfo:TextDocument nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Properties

Name Type Notes Description
commentCharacterCount integer The amount of character in comments i.e. characters ignored by the compiler/interpreter.
definesClass string Name of a class defined in the source code file.
definesFunction string A name of a function/method defined in the given source code file.
definesGlobalVariable string Name of a global variable defined within the source code file.
programmingLanguage string Indicates the name of the programming language this source code file is written in. Examples might include ‘C’, ‘C++’, ‘Java’ etc

Spreadsheet

A spreadsheet, created by a spreadsheet application. Examples might include Gnumeric, OpenOffice Calc or MS Excel.

Class hierarchy

G nfo:Spreadsheet nfo:Spreadsheet nfo:Document nfo:Document nfo:Document--nfo:Spreadsheet nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

TextDocument

A text document

Class hierarchy

G nfo:TextDocument nfo:TextDocument nfo:PaginatedTextDocument nfo:PaginatedTextDocument nfo:TextDocument--nfo:PaginatedTextDocument nfo:PlainTextDocument nfo:PlainTextDocument nfo:TextDocument--nfo:PlainTextDocument nfo:Document nfo:Document nfo:Document--nfo:TextDocument nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Document rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Properties

Name Type Notes Description
characterCount integer The amount of characters in the document.
lineCount integer The amount of lines in a text document
wordCount integer The amount of words in a text document.

Trash

Represents a container for deleted files, a feature common in modern operating systems.

Class hierarchy

G nfo:Trash nfo:Trash nfo:DataContainer nfo:DataContainer nfo:DataContainer--nfo:Trash nie:InformationElement nie:InformationElement nie:InformationElement--nfo:DataContainer rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

VectorImage

A vector image (e.g. SVG)

Class hierarchy

G nfo:VectorImage nfo:VectorImage nfo:Image nfo:Image nfo:Image--nfo:VectorImage nfo:Visual nfo:Visual nfo:Visual--nfo:Image nfo:Media nfo:Media nfo:Media--nfo:Visual nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Media rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Video

A video file.

Note: This class emits notifications about changes, and can be monitored using TrackerNotifier.

Class hierarchy

G nfo:Video nfo:Video nmm:Movie nmm:Movie nfo:Video--nmm:Movie nmm:TVShow nmm:TVShow nfo:Video--nmm:TVShow nmm:Video nmm:Video nfo:Video--nmm:Video nfo:Visual nfo:Visual nfo:Visual--nfo:Video nfo:Media nfo:Media nfo:Media--nfo:Visual nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Media rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Properties

Name Type Notes Description
averageVideoBitrate double The average overall bitrate of a media container. (i.e. the size of the piece of media in bits, divided by it’s duration expressed in seconds).
frameCount integer The amount of frames in a video sequence.
frameRate double Amount of video frames per second.

Visual

File containing visual content.

Class hierarchy

G nfo:Visual nfo:Visual nfo:Image nfo:Image nfo:Visual--nfo:Image nfo:Video nfo:Video nfo:Visual--nfo:Video nmm:Movie nmm:Movie nfo:Visual--nmm:Movie nmm:TVShow nmm:TVShow nfo:Visual--nmm:TVShow nfo:Media nfo:Media nfo:Media--nfo:Visual nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Media rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Properties

Name Type Notes Description
aspectRatio double Visual content aspect ratio. (Width divided by Height)
colorDepth integer Amount of bits used to express the color of each pixel.
heading double Specifies the direction of travelling while capturing image/video. The range of values from 0.00 to 359.99 (where 0 is due North, 90 is East, 180 South and 270 is West)
height integer Visual content height in pixels.
interlaceMode boolean True if the image is interlaced, false if not.
tilt double Vertical inclination of the camera while capturing the image, in angles starting on 0 as horizontal, positive numbers pointing up, negative angles pointing down
width integer Visual content width in pixels.

WebHistory

A web history entry

Note: This class emits notifications about changes, and can be monitored using TrackerNotifier.

Class hierarchy

G nfo:WebHistory nfo:WebHistory nie:InformationElement nie:InformationElement nie:InformationElement--nfo:WebHistory rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Properties

Name Type Notes Description
domain string
uri string

Website

A website, usually a container for remote resources, that may be interpreted as HTMLDocuments, images or other types of content.

Class hierarchy

G nfo:Website nfo:Website nie:InformationElement nie:InformationElement nie:InformationElement--nfo:Website rdfs:Resource rdfs:Resource rdfs:Resource--nie:InformationElement

Additional properties for nie:DataObject

Properties this ontology defines which can describe nie:DataObject resources.

Name Type Notes Description
belongsToContainer DataContainer Models the containment relations between Files and Folders (or CompressedFiles).

Additional properties for nie:InformationElement

Properties this ontology defines which can describe nie:InformationElement resources.

Name Type Notes Description
isBootable boolean True when the file is bootable, for example like an ISO or other disc images
isContentEncrypted boolean Might change (IE of DataObject property?)

Additional properties for rdfs:Resource

Properties this ontology defines which can describe rdfs:Resource resources.

Name Type Notes Description
depiction Image Relates an information element to an image which depicts said element.

Credits and Copyright

Authors:

  • Antoni Mylka, DFKI, <antoni.mylka@dfki.de>
  • Leo Sauermann, DFKI, <leo.sauermann@dfki.de>
  • Ludger van Elst, DFKI, <elst@dfki.uni-kl.de>
  • Michael Sintek, DFKI, <michael.sintek@dfki.de>
  • Tracker Developers

Editors:

  • Antoni Mylka, DFKI, <antoni.mylka@dfki.de>
  • Tracker developers (translation into turtle)

Contributors:

  • Christiaan Fluit, Aduna, <christiaan.fluit@aduna-software.com>
  • Evgeny ‘phreedom’ Egorochkin, KDE Strigi Developer, <stexx@mail.ru>

Upstream: Upstream version

ChangeLog: Tracker changes

Copyright: © 2007 DFKI © 2009 Nokia. The ontologies are made available under the terms of NEPOMUK software license (FIXME verify)