Abstract

NEPOMUK File Ontology (NFO) intends to provide vocabulary to express information extracted from various sources. They include files, pieces of sotware and remote hosts. This document gives an overview of NFO and describes its classes and properties.

Status of this document

This document arose from the work of the Task-Force ontologies within the NEPOMUK project. This document is a DRAFT made available by the Nepomuk Consortium for discussion only. This document is a work in progress and may be updated, replaced, or rendered obsolete by other documents at any time.

This document is a part in a set of seven documents, which together comprise the complete specification of the Nepomuk Information Element Ontology Framework. These are: NIE, NFO, NCO, NMO, NCAL, NEXIF, NID3.

Ontology Visualisation

Change Log

Introduction

Nepomuk File Ontology (NFO) is one of the fundamental parts of NIE. It deals with files and other desktop resources. Files are understood as sequences of bytes stored in a Filesystem or on a Network. It provides subclasses both of a DataObject and an InformationElement. A basic hierarchy of FileDataObject subclasses is provided. It includes a 'normal' FileDataObject, that usually resides on a typical filesystem, but also allows for other kinds of files - those embedded in, or attached to other data items, as well as deleted and stored in a trash folder. This hierarchy is by no means complete. More complete taxonomies, that either add additional FileDataObject subclasses or extend ones provided in this ontology may appear in future.

FileDataObject

The cornerstone of the NFO is the FileDataObject class. It represents files - finite sequences of bytes available from some durable storage medium. This definition explicitly exludes streams (which are potentially infinite) but includes web documents and other resources resolvable via a URL. As mentioned before there are various types of files. They are reflected in the hierarchy of subclasses of the File class. This hierarchy is expected to grow when users add new types of files relevant to their work.

Folders and Compressed files

Each file on a hard disk is usually contained within a folder or a directory (the naming depends on the Operating System). They are represented by the Folder class. The containment relation can be expressed with the belongsToContainer property. Note that a Folder is an interpretation. It may be applied to a FileDataObject (representing a folder on a disk), but it can also be applied to an ArchiveItem (representing a folder inside an archive), or to a MailboxDataObject (representing a mail folder on an IMAP server).

Compressed Files are expressed with an Archive class. It is also an interpretation that may be applied to any piece of data. An important thing to note is that Nepomuk strives for data integration. It shouldn't make much difference if a file is within a normal folder or within an archive. That's why no special case is made for the fileUrl property for files in compressed archives. In both cases a file should be accessible with a URL. In case of stand-alone files this is simple. Unfortunately there are no standards defining the way to construct URL's for files inside compressed archives. We encourage applications to use conventions established by the Apache Virtual File System project. For cases when no URL can be constructed for a file (e.g. a picture inside an archive attached to an event in an outlook calendar) the entire containment tree needs to be examined to find ways for accessing a file.

Remote Resources

NFO includes basic vocabulary to describe remote resources. Its notion of a FileDataObject is universal. The fileUrl property can just as well be set to a http:// address. To facilitate processing a RemoteDataObject class has been introduced. Its purpose is to have a 'semantic' way of expressing the fact that an instance of a FileDataObject class actually refers to a remote resource. Otherwise the applications would have to check manually if the url begins with http://.

Examples

Example files that show how to use the expressive power of the ontology will be published here in near future.

Ontology Classes Description

Application

Superclasses nao:Agent, nie:InformationElement, rdfs:Resource, nfo:Software
Subclasses --
In domain of: --
In range of: dcon:activeApplication
Description An application

Archive

Superclasses nfo:DataContainer, nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: nfo:uncompressedSize
In range of: --
Description A compressed file. May contain other files or folder inside.

ArchiveItem

Superclasses nie:DataObject, nfo:EmbeddedFileDataObject, nfo:FileDataObject, rdfs:Resource
Subclasses --
In domain of: nfo:isPasswordProtected
In range of: --
Description A file entity inside an archive.

Attachment

Superclasses nie:DataObject, nfo:EmbeddedFileDataObject, nfo:FileDataObject, rdfs:Resource
Subclasses ncal:Attachment
In domain of: --
In range of: nmo:hasAttachment
Description A file attached to another data object. Many data formats allow for attachments: emails, vcards, ical events, id3 and exif...

Audio

Superclasses nie:InformationElement, nfo:Media, rdfs:Resource
Subclasses nid3:ID3Audio, nmm:MusicPiece
In domain of: nfo:bitsPerSample, nfo:channels, nfo:sampleCount, nfo:sampleRate
In range of: --
Description A file containing audio content

Bookmark

Superclasses nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: nfo:bookmarks, nfo:characterPosition, nfo:pageNumber, nfo:streamPosition
In range of: nfo:containsBookmark
Description 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.

BookmarkFolder

Superclasses nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: nfo:containsBookmark, nfo:containsBookmarkFolder
In range of: nfo:containsBookmarkFolder
Description A folder with bookmarks of a webbrowser. Use nfo:containsBookmark to relate Bookmarks. Folders can contain subfolders, use containsBookmarkFolder to relate them.

CompressionType

Superclasses rdfs:Resource
Subclasses --
In domain of: --
In range of: nfo:compressionType
Description Type of compression. Instances of this class represent the limited set of values allowed for the nfo:compressionType property.
Instances nfo:losslessCompressionType, nfo:lossyCompressionType

Cursor

Superclasses nfo:Image, nie:InformationElement, nfo:Media, nfo:RasterImage, rdfs:Resource, nfo:Visual
Subclasses --
In domain of: --
In range of: --
Description A Cursor.

DataContainer

Superclasses nie:InformationElement, rdfs:Resource
Subclasses nfo:Archive, nfo:Filesystem, nfo:FilesystemImage, nfo:Folder, nfo:Trash
In domain of: --
In range of: nfo:belongsToContainer
Description 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.

DeletedResource

Superclasses nie:DataObject, nfo:FileDataObject, rdfs:Resource
Subclasses --
In domain of: nfo:deletionDate, nfo:originalLocation
In range of: --
Description 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.

Document

Superclasses nie:InformationElement, rdfs:Resource
Subclasses nfo:HtmlDocument, nfo:MindMap, nfo:PaginatedTextDocument, nfo:PlainTextDocument, nfo:Presentation, nfo:SourceCode, nfo:Spreadsheet, nfo:TextDocument
In domain of: --
In range of: --
Description A generic document. A common superclass for all documents on the desktop.

EmbeddedFileDataObject

Superclasses nie:DataObject, nfo:FileDataObject, rdfs:Resource
Subclasses nfo:ArchiveItem, nfo:Attachment, ncal:Attachment
In domain of: nfo:encoding
In range of: --
Description 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.

EncryptionStatus

Superclasses rdfs:Resource
Subclasses --
In domain of: --
In range of: nfo:encryptionStatus
Description The status of the encryption of an InformationElement. nfo:encryptedStatus means that the InformationElement has been encrypted and couldn't be decrypted by the extraction software, thus no content is available. nfo:decryptedStatus means that decryption was successfull and the content is available.
Instances nfo:decryptedStatus, nfo:encryptedStatus

Executable

Superclasses nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description An executable file.

FileDataObject

Superclasses nie:DataObject, rdfs:Resource
Subclasses nfo:ArchiveItem, nfo:Attachment, ncal:Attachment, nfo:DeletedResource, nfo:EmbeddedFileDataObject, nfo:LocalFileDataObject, ndo:P2PFile, nfo:RemoteDataObject, ndo:TorrentedFile
In domain of: nfo:fileCreated, nfo:fileLastAccessed, nfo:fileLastModified, nfo:fileName, nfo:fileOwner, nfo:fileSize, nfo:fileUrl, nfo:hasHash, nfo:permissions
In range of: --
Description 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.

FileHash

Superclasses rdfs:Resource
Subclasses --
In domain of: nfo:hashAlgorithm, nfo:hashValue
In range of: nfo:hasHash
Description A fingerprint of the file, generated by some hashing function.

Filesystem

Superclasses nfo:DataContainer, nie:InformationElement, rdfs:Resource
Subclasses nfo:FilesystemImage
In domain of: nfo:filesystemType, nfo:freeSpace, nfo:occupiedSpace, nfo:totalSpace, nfo:uuid
In range of: --
Description A filesystem. Examples of filesystems include hard disk partitions, removable media, but also images thereof stored in files such as ISO.

FilesystemImage

Superclasses nfo:DataContainer, nfo:Filesystem, nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description 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). Deprecated in favor of nfo:Filesystem.

Folder

Superclasses nfo:DataContainer, nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: --
In range of: pimo:hasFolder
Description A folder/directory. Examples of folders include folders on a filesystem and message folders in a mailbox.

Font

Superclasses nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: nfo:fontFamily, nfo:foundry
In range of: --
Description A font.

HardDiskPartition

Superclasses nie:DataObject, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description A partition on a hard disk

HtmlDocument

Superclasses nfo:Document, nie:InformationElement, nfo:PlainTextDocument, rdfs:Resource, nfo:TextDocument
Subclasses --
In domain of: --
In range of: --
Description A HTML document, may contain links to other files.

Icon

Superclasses nfo:Image, nie:InformationElement, nfo:Media, rdfs:Resource, nfo:Visual
Subclasses --
In domain of: --
In range of: --
Description 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.

Image

Superclasses nie:InformationElement, nfo:Media, rdfs:Resource, nfo:Visual
Subclasses nfo:Cursor, nfo:Icon, nexif:Photo, nfo:RasterImage, nfo:VectorImage
In domain of: nfo:depicts, nfo:horizontalResolution, nfo:verticalResolution
In range of: nmm:artwork, nfo:depiction
Description A file containing an image.

LocalFileDataObject

Superclasses nie:DataObject, nfo:FileDataObject, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description A local file data object which is stored on a local file system. Its nie:url always uses the file:/ protocol. The main use of this class is to distinguish local and non-local files.

Media

Superclasses nie:InformationElement, rdfs:Resource
Subclasses nfo:Audio, nfo:Cursor, nid3:ID3Audio, nfo:Icon, nfo:Image, nmm:Movie, nmm:MusicPiece, nexif:Photo, nfo:RasterImage, nmm:TVShow, nfo:VectorImage, nfo:Video, nfo:Visual
In domain of: nmm:artwork, nfo:averageBitrate, nfo:bitDepth, nfo:bitrateType, nfo:codec, nfo:compressionType, nfo:count, nfo:duration, nmm:genre, nfo:hasMediaStream, nfo:rate, nmm:releaseDate
In range of: --
Description 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).

MediaFileListEntry

Superclasses rdfs:Resource
Subclasses --
In domain of: --
In range of: nfo:hasMediaFileListEntry
Description 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.

MediaList

Superclasses nie:InformationElement, rdfs:Resource
Subclasses nmm:MusicAlbum
In domain of: nfo:hasMediaFileListEntry
In range of: --
Description A file containing a list of media files.e.g. a playlist

MediaStream

Superclasses nie:DataObject, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description 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.

MindMap

Superclasses nfo:Document, nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description A MindMap, created by a mind-mapping utility. Examples might include FreeMind or mind mapper.

OperatingSystem

Superclasses nao:Agent, nie:InformationElement, rdfs:Resource, nfo:Software
Subclasses --
In domain of: --
In range of: --
Description An OperatingSystem

PaginatedTextDocument

Superclasses nfo:Document, nie:InformationElement, rdfs:Resource, nfo:TextDocument
Subclasses --
In domain of: nfo:pageCount
In range of: --
Description A file containing a text document, that is unambiguously divided into pages. Examples might include PDF, DOC, PS, DVI etc.

Placemark

Superclasses nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: --
In range of: nfo:containsPlacemark
Description One placemark within a placemark container/file. Use nie:title for the name/label, nao:creator for defining the creator.

PlacemarkContainer

Superclasses nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: nfo:containsPlacemark
In range of: --
Description A data object containing placemark(s). Use nie:contentCreated to represent the date when the user created the dataobject, nao:creator for defining the creator, nie:contentLastModified for modifications. nfo:containsPlacemark to refer to individual placemarks within.

PlainTextDocument

Superclasses nfo:Document, nie:InformationElement, rdfs:Resource, nfo:TextDocument
Subclasses nfo:HtmlDocument, nfo:SourceCode
In domain of: --
In range of: --
Description A file containing plain text (ASCII, Unicode or other encodings). Examples may include TXT, HTML, XML, program source code etc.

Presentation

Superclasses nfo:Document, nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description A Presentation made by some presentation software (Corel Presentations, OpenOffice Impress, MS Powerpoint etc.)

RasterImage

Superclasses nfo:Image, nie:InformationElement, nfo:Media, rdfs:Resource, nfo:Visual
Subclasses nfo:Cursor, nexif:Photo
In domain of: nfo:colorCount, nfo:paletteSize
In range of: --
Description A raster image.

RemoteDataObject

Superclasses nie:DataObject, nfo:FileDataObject, rdfs:Resource
Subclasses ndo:P2PFile, ndo:TorrentedFile
In domain of: --
In range of: --
Description 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.

RemotePortAddress

Superclasses nie:DataObject, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description 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.

Software

Superclasses nao:Agent, nie:InformationElement, rdfs:Resource
Subclasses nfo:Application, nfo:OperatingSystem
In domain of: nfo:conflicts, nfo:supercedes
In range of: nfo:conflicts, nfo:supercedes
Description A piece of software. Examples may include applications and the operating system. This interpretation most commonly applies to SoftwareItems.

SoftwareItem

Superclasses nie:DataObject, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description A DataObject representing a piece of software. Examples of interpretations of a SoftwareItem include an Application and an OperatingSystem.

SoftwareService

Superclasses nie:DataObject, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description A service published by a piece of software, either by an operating system or an application. Examples of such services may include calendar, addressbook 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.

SourceCode

Superclasses nfo:Document, nie:InformationElement, nfo:PlainTextDocument, rdfs:Resource, nfo:TextDocument
Subclasses --
In domain of: nfo:commentCharacterCount, nfo:definesClass, nfo:definesFunction, nfo:definesGlobalVariable, nfo:programmingLanguage
In range of: --
Description Code in a compilable or interpreted programming language.

Spreadsheet

Superclasses nfo:Document, nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description A spreadsheet, created by a spreadsheet application. Examples might include Gnumeric, OpenOffice Calc or MS Excel.

TextDocument

Superclasses nfo:Document, nie:InformationElement, rdfs:Resource
Subclasses nfo:HtmlDocument, nfo:PaginatedTextDocument, nfo:PlainTextDocument, nfo:SourceCode
In domain of: nfo:characterCount, nfo:lineCount, nfo:wordCount
In range of: --
Description A text document

Trash

Superclasses nfo:DataContainer, nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description Represents a container for deleted files, a feature common in modern operating systems.

VectorImage

Superclasses nfo:Image, nie:InformationElement, nfo:Media, rdfs:Resource, nfo:Visual
Subclasses --
In domain of: --
In range of: --
Description

Video

Superclasses nie:InformationElement, nfo:Media, rdfs:Resource, nfo:Visual
Subclasses nmm:Movie, nmm:TVShow
In domain of: nmm:actor, nmm:assistantDirector, nmm:audienceRating, nmm:cinematographer, nmm:director, nfo:frameCount, nfo:frameRate, nmm:producer, nmm:synopsis, nmm:writer
In range of: --
Description A video file.

Visual

Superclasses nie:InformationElement, nfo:Media, rdfs:Resource
Subclasses nfo:Cursor, nfo:Icon, nfo:Image, nmm:Movie, nexif:Photo, nfo:RasterImage, nmm:TVShow, nfo:VectorImage, nfo:Video
In domain of: nfo:aspectRatio, nfo:colorDepth, nfo:height, nfo:interlaceMode, nfo:width
In range of: --
Description File containing visual content.

WebDataObject

Superclasses nie:DataObject, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description An information resources of which representations (files, streams) can be retrieved through a web server. They may be generated at retrieval time. Typical examples are pages served by PHP or AJAX or mp3 streams.

Website

Superclasses nie:InformationElement, rdfs:Resource
Subclasses --
In domain of: --
In range of: --
Description A website, usually a container for remote resources, that may be interpreted as HTMLDocuments, images or other types of content.

Ontology Properties Description

aspectRatio

Type rdf:Property, rdfs:Resource
Domain nfo:Visual
Range xsd:float
Maximal cardinality 1
Superproperties --
Subproperties --
Description Visual content aspect ratio. (Width divided by Height)

averageBitrate

Type rdf:Property, rdfs:Resource
Domain nfo:Media
Range xsd:float
Maximal cardinality 1
Superproperties nfo:rate
Subproperties --
Description 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).

belongsToContainer

Type rdf:Property, rdfs:Resource
Domain nie:DataObject
Range nfo:DataContainer
Superproperties dcterms:isPartOf, nie:isPartOf
Subproperties --
Description Models the containment relations between Files and Folders (or CompressedFiles).

bitDepth

Type rdf:Property, rdfs:Resource
Domain nfo:Media
Range rdfs:Literal
Maximal cardinality 1
Superproperties --
Subproperties nfo:bitsPerSample, nfo:colorDepth
Description 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

Type rdf:Property, rdfs:Resource
Domain nfo:Media
Range xsd:string
Maximal cardinality 1
Superproperties --
Subproperties --
Description The type of the bitrate. Examples may include CBR and VBR.

bitsPerSample

Type rdf:Property, rdfs:Resource
Domain nfo:Audio
Range xsd:integer
Maximal cardinality 1
Superproperties nfo:bitDepth
Subproperties --
Description Amount of bits in each audio sample.

bookmarks

Type rdf:Property, rdfs:Resource
Domain nfo:Bookmark
Range nie:DataObject
Cardinality 1
Superproperties nie:links, nie:relatedTo, dc:relation
Subproperties --
Description The address of the linked object. Usually a web URI.

channels

Type rdf:Property, rdfs:Resource
Domain nfo:Audio
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties nfo:frontChannels, nfo:lfeChannels, nfo:rearChannels, nfo:sideChannels
Description Number of channels. This property is to be used directly if no detailed information is necessary. Otherwise use more detailed subproperties.

characterCount

Type rdf:Property, rdfs:Resource
Domain nfo:TextDocument
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description The amount of characters in the document.

characterPosition

Type rdf:Property, rdfs:Resource
Domain nfo:Bookmark
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description Character position of the bookmark.

codec

Type rdf:Property, rdfs:Resource
Domain nfo:Media
Range rdfs:Literal
Superproperties --
Subproperties --
Description The name of the codec necessary to decode a piece of media.

colorCount

Type rdf:Property, rdfs:Resource
Domain nfo:RasterImage
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description The number of colors used/available in a raster image.

colorDepth

Type rdf:Property, rdfs:Resource
Domain nfo:Visual
Range xsd:integer
Maximal cardinality 1
Superproperties nfo:bitDepth
Subproperties --
Description Amount of bits used to express the color of each pixel.

commentCharacterCount

Type rdf:Property, rdfs:Resource
Domain nfo:SourceCode
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description The amount of character in comments i.e. characters ignored by the compiler/interpreter.

compressionType

Type rdf:Property, rdfs:Resource
Domain nfo:Media
Range nfo:CompressionType
Maximal cardinality 1
Superproperties --
Subproperties --
Description The type of the compression. Values include, 'lossy' and 'lossless'.

conflicts

Type rdf:Property, rdfs:Resource
Domain nfo:Software
Range nfo:Software
Superproperties --
Subproperties --
Description States that a piece of software is in conflict with another piece of software.

containsBookmark

Type rdf:Property, rdfs:Resource
Domain nfo:BookmarkFolder
Range nfo:Bookmark
Superproperties nie:hasLogicalPart, dcterms:hasPart
Subproperties --
Description The folder contains a bookmark.

containsBookmarkFolder

Type rdf:Property, rdfs:Resource
Domain nfo:BookmarkFolder
Range nfo:BookmarkFolder
Superproperties nie:hasLogicalPart, dcterms:hasPart
Subproperties --
Description The folder contains a bookmark folder.

containsPlacemark

Type rdf:Property, rdfs:Resource
Domain nfo:PlacemarkContainer
Range nfo:Placemark
Superproperties nie:hasLogicalPart, dcterms:hasPart
Subproperties --
Description Containment relation between placemark containers (files) and placemarks within.

count

Type rdf:Property, rdfs:Resource
Domain nfo:Media
Range xsd:integer
Superproperties --
Subproperties nfo:frameCount, nfo:sampleCount
Description A common superproperty for all properties signifying the amount of atomic media data units. Examples of subproperties may include sampleCount and frameCount.

definesClass

Type rdf:Property, rdfs:Resource
Domain nfo:SourceCode
Range xsd:string
Superproperties --
Subproperties --
Description Name of a class defined in the source code file.

definesFunction

Type rdf:Property, rdfs:Resource
Domain nfo:SourceCode
Range xsd:string
Superproperties --
Subproperties --
Description A name of a function/method defined in the given source code file.

definesGlobalVariable

Type rdf:Property, rdfs:Resource
Domain nfo:SourceCode
Range xsd:string
Superproperties --
Subproperties --
Description Name of a global variable defined within the source code file.

deletionDate

Type rdf:Property, rdfs:Resource
Domain nfo:DeletedResource
Range xsd:dateTime
Maximal cardinality 1
Superproperties --
Subproperties --
Description The date and time of the deletion.

depiction

Type rdf:Property, rdfs:Resource
Domain rdfs:Resource
Range nfo:Image
Inverse property nfo:depicts
Superproperties --
Subproperties nmm:artwork
Description Relates an information element to an image which depicts said element.

depicts

Type rdf:Property, rdfs:Resource
Domain nfo:Image
Range rdfs:Resource
Inverse property nfo:depiction
Superproperties --
Subproperties --
Description Relates an image to the information elements it depicts.

duration

Type rdf:Property, rdfs:Resource
Domain nfo:Media
Range xsd:duration
Maximal cardinality 1
Superproperties --
Subproperties --
Description Duration of a media piece.

encoding

Type rdf:Property, rdfs:Resource
Domain nfo:EmbeddedFileDataObject
Range xsd:string
Maximal cardinality 1
Superproperties --
Subproperties --
Description The encoding used for the Embedded File. Examples might include BASE64 or UUEncode

encryptionStatus

Type rdf:Property, rdfs:Resource
Domain nie:InformationElement
Range nfo:EncryptionStatus
Maximal cardinality 1
Superproperties --
Subproperties --
Description The status of the encryption of the InformationElement.

fileCreated

Type rdf:Property, rdfs:Resource
Domain nfo:FileDataObject
Range xsd:dateTime
Maximal cardinality 1
Superproperties nao:annotation, dcterms:created, nie:created, nao:created, nao:modified, dcterms:modified, nie:modified
Subproperties --
Description File creation date

fileLastAccessed

Type rdf:Property, rdfs:Resource
Domain nfo:FileDataObject
Range xsd:dateTime
Maximal cardinality 1
Superproperties dc:date
Subproperties --
Description Time when the file was last accessed.

fileLastModified

Type rdf:Property, rdfs:Resource
Domain nfo:FileDataObject
Range xsd:dateTime
Superproperties nao:annotation, dc:date, nie:lastModified, nao:lastModified, nao:modified, dcterms:modified, nie:modified
Subproperties --
Description last modification date

fileName

Type rdf:Property, rdfs:Resource
Domain nfo:FileDataObject
Range xsd:string
Maximal cardinality 1
Superproperties rdfs:label, nao:prefLabel
Subproperties --
Description Name of the file, together with the extension

fileOwner

Type rdf:Property, rdfs:Resource
Domain nfo:FileDataObject
Range nco:Contact
Maximal cardinality 1
Superproperties --
Subproperties --
Description The owner of the file as defined by the file system access rights feature.

fileSize

Type rdf:Property, rdfs:Resource
Domain nfo:FileDataObject
Range xsd:integer
Maximal cardinality 1
Superproperties nie:byteSize
Subproperties --
Description 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

fileUrl

Type rdf:Property, rdfs:Resource
Domain nfo:FileDataObject
Range rdfs:Resource
Superproperties nie:url
Subproperties --
Description URL of the file. It points at the location of the file. In cases where creating a simple file:// or http:// URL for a file is difficult (e.g. for files inside compressed archives) the applications are encouraged to use conventions defined by Apache Commons VFS Project at http://jakarta.apache.org/ commons/ vfs/ filesystems.html.

filesystemType

Type rdf:Property, rdfs:Resource
Domain nfo:Filesystem
Range xsd:string
Maximal cardinality 1
Superproperties --
Subproperties --
Description Type of filesystem such as ext3 and ntfs.

fontFamily

Type rdf:Property, rdfs:Resource
Domain nfo:Font
Range xsd:string
Maximal cardinality 1
Superproperties --
Subproperties --
Description The name of the font family.

foundry

Type rdf:Property, rdfs:Resource
Domain nfo:Font
Range nco:Contact
Maximal cardinality 1
Superproperties nao:annotation, nao:contributor, nco:contributor, dc:contributor, nao:creator, nco:creator, dc:creator
Subproperties --
Description The foundry, the organization that created the font.

frameCount

Type rdf:Property, rdfs:Resource
Domain nfo:Video
Range xsd:integer
Maximal cardinality 1
Superproperties nfo:count
Subproperties --
Description The amount of frames in a video sequence.

frameRate

Type rdf:Property, rdfs:Resource
Domain nfo:Video
Range xsd:float
Maximal cardinality 1
Superproperties nfo:rate
Subproperties --
Description Amount of video frames per second.

freeSpace

Type rdf:Property, rdfs:Resource
Domain nfo:Filesystem
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description Unoccupied storage space of the filesystem.

frontChannels

Type rdf:Property, rdfs:Resource
Domain --
Range xsd:integer
Maximal cardinality 1
Superproperties nfo:channels
Subproperties --
Description Number of front channels.

hasHash

Type nrl:DefiningProperty, rdf:Property, rdfs:Resource
Domain nfo:FileDataObject
Range nfo:FileHash
Superproperties --
Subproperties --
Description Links the file with it's hash value.

hasMediaFileListEntry

Type rdf:Property, rdfs:Resource
Domain nfo:MediaList
Range nfo:MediaFileListEntry
Superproperties --
Subproperties --
Description This property is intended to point to an RDF list of MediaFiles.

hasMediaStream

Type rdf:Property, rdfs:Resource
Domain nfo:Media
Range nie:DataObject
Superproperties dcterms:hasPart, nie:hasPart, nie:relatedTo, dc:relation
Subproperties --
Description Connects a media container with a single media stream contained within.

hashAlgorithm

Type rdf:Property, rdfs:Resource
Domain nfo:FileHash
Range xsd:string
Maximal cardinality 1
Superproperties --
Subproperties --
Description Name of the algorithm used to compute the hash value. Examples might include CRC32, MD5, SHA, TTH etc.

hashValue

Type rdf:Property, rdfs:Resource
Domain nfo:FileHash
Range xsd:string
Cardinality 1
Superproperties --
Subproperties --
Description The actual value of the hash.

height

Type rdf:Property, rdfs:Resource
Domain nfo:Visual
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties nexif:imageLength
Description Visual content height in pixels.

horizontalResolution

Type rdf:Property, rdfs:Resource
Domain nfo:Image
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description Horizontal resolution of an image (if printed). Expressed in DPI.

interlaceMode

Type rdf:Property, rdfs:Resource
Domain nfo:Visual
Range xsd:boolean
Maximal cardinality 1
Superproperties --
Subproperties --
Description True if the image is interlaced, false if not.

isPasswordProtected

Type rdf:Property, rdfs:Resource
Domain nfo:ArchiveItem
Range xsd:boolean
Maximal cardinality 1
Superproperties --
Subproperties --
Description States if a given resource is password-protected.

lfeChannels

Type rdf:Property, rdfs:Resource
Domain --
Range xsd:integer
Maximal cardinality 1
Superproperties nfo:channels
Subproperties --
Description Number of Low Frequency Expansion (subwoofer) channels.

lineCount

Type rdf:Property, rdfs:Resource
Domain nfo:TextDocument
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description The amount of lines in a text document

occupiedSpace

Type rdf:Property, rdfs:Resource
Domain nfo:Filesystem
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description Occupied storage space of the filesystem.

originalLocation

Type rdf:Property, rdfs:Resource
Domain nfo:DeletedResource
Range xsd:string
Maximal cardinality 1
Superproperties --
Subproperties --
Description The original location of the deleted resource.

pageCount

Type rdf:Property, rdfs:Resource
Domain nfo:PaginatedTextDocument
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description Number of pages.

pageNumber

Type rdf:Property, rdfs:Resource
Domain nfo:Bookmark
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description Page linked by the bookmark.

paletteSize

Type rdf:Property, rdfs:Resource
Domain nfo:RasterImage
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description The number of colors defined in palette of the raster image.

permissions

Type rdf:Property, rdfs:Resource
Domain nfo:FileDataObject
Range xsd:string
Maximal cardinality 1
Superproperties --
Subproperties --
Description A string containing the permissions of a file. A feature common in many UNIX-like operating systems.

programmingLanguage

Type rdf:Property, rdfs:Resource
Domain nfo:SourceCode
Range xsd:string
Superproperties --
Subproperties --
Description Indicates the name of the programming language this source code file is written in. Examples might include 'C', 'C++', 'Java' etc.

rate

Type rdf:Property, rdfs:Resource
Domain nfo:Media
Range xsd:float
Superproperties --
Subproperties nfo:averageBitrate, nfo:frameRate, nfo:sampleRate
Description A common superproperty for all properties specifying the media rate. Examples of subproperties may include frameRate for video and sampleRate for audio. This property is expressed in units per second.

rearChannels

Type rdf:Property, rdfs:Resource
Domain --
Range xsd:integer
Maximal cardinality 1
Superproperties nfo:channels
Subproperties --
Description Number of rear channels.

sampleCount

Type rdf:Property, rdfs:Resource
Domain nfo:Audio
Range xsd:integer
Maximal cardinality 1
Superproperties nfo:count
Subproperties --
Description The amount of samples in an audio clip.

sampleRate

Type rdf:Property, rdfs:Resource
Domain nfo:Audio
Range xsd:float
Maximal cardinality 1
Superproperties nfo:rate
Subproperties --
Description The amount of audio samples per second.

sideChannels

Type rdf:Property, rdfs:Resource
Domain --
Range xsd:integer
Maximal cardinality 1
Superproperties nfo:channels
Subproperties --
Description Number of side channels

streamPosition

Type rdf:Property, rdfs:Resource
Domain nfo:Bookmark
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description Stream position of the bookmark, suitable for e.g. audio books. Expressed in milliseconds

supercedes

Type rdf:Property, rdfs:Resource
Domain nfo:Software
Range nfo:Software
Superproperties --
Subproperties --
Description States that a piece of software supercedes another piece of software.

totalSpace

Type rdf:Property, rdfs:Resource
Domain nfo:Filesystem
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description Total storage space of the filesystem, which can be different from nie:contentSize because the latter includes filesystem format overhead.

uncompressedSize

Type rdf:Property, rdfs:Resource
Domain nfo:Archive
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description Uncompressed size of the content of a compressed file.

uuid

Type rdf:Property, rdfs:Resource
Domain nfo:Filesystem
Range xsd:string
Superproperties nie:identifier, dc:identifier, nao:identifier
Subproperties --
Description Universally unique identifier of the filesystem. In the future, this property may have its parent changed to a more generic class.

verticalResolution

Type rdf:Property, rdfs:Resource
Domain nfo:Image
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description Vertical resolution of an Image (if printed). Expressed in DPI

width

Type rdf:Property, rdfs:Resource
Domain nfo:Visual
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description Visual content width in pixels.

wordCount

Type rdf:Property, rdfs:Resource
Domain nfo:TextDocument
Range xsd:integer
Maximal cardinality 1
Superproperties --
Subproperties --
Description The amount of words in a text document.