Networked Knowledge Organization Systems
Dublin Core Application Profile
http://w3id.org/nkos Title Networked Knowledge Organization Systems Application Profile (NKOS AP) Comment This file specifies the set of RDF classes and properties used in NKOS AP Creator Contributor Described by Date Created 2014-04-03 Date Modified 2015-10-03 Version 0.2
Section 1. Introduction
The term knowledge organization system (KOS) is intended to encompass all types of schemes for organizing information and promoting knowledge management. Different families of knowledge organization systems, including thesauri, classification schemes, subject heading systems, taxonomies, and ontologies are widely recognized and applied in both modern and traditional information systems. The information about a KOS, including its data model, type, protocol, status, responsible body, available format, affectivity, and other descriptive data are very important to terminology registries, service registries, vocabulary users (machine or human), and retrieval systems. At a minimum level, metadata for KOS resources will describe specific characteristics of a KOS, facilitate the discovery of KOS resources, assist in the evaluation of such resources for a particular application or use, and facilitate sharing, reusing, and collaboration of the KOS resources. This Dublin Core Application Profile for describing KOS resources is developed based on the work the Networked Knowledge Organization Systems (NKOS) group[http://nkos.slis.kent.edu/] members have done since 1998.
Namespaces used by this AP
NKOS AP at a glance
This section is non-normative.
Classes dct:Agent , dct:AgentClass , adms:Asset , frbrer:Expression , dct:LinguisticSystem , frbrer:Manifestation , dct:MediaTypeOrExtent, dct:RightsStatement , frsad:Thema , frbrer:Work
nkos:alignedWith , nkos:basedOn , nkos:serviceOffered , nkos:sizeNote , nkos:updateFrequency , nkos:usedBy -reused: dct:audience , dcat:contactPoint , dct:created , dct:creator , wdrs:describedBy , dct:description , dct:format , dct:identifier , frbrer:isEmbodimentOf , dct:isPartOf , frbrer:isRealizationOf , dct:issued , dct:language , dct:modified , dct:publisher , dct:relation , dct:rights , adms:sample , dct:subject , dct: title , dct:type , prov:wasDerivedFrom
Section 2. Re-used Classes
Agenthttp://purl.org/dc/terms/Agentdct:Agent Definition: A resource that acts or has the power to act. Description Examples of Agent include person, organization, and software agent. rdfs:label Agent
Agent Classhttp://purl.org/dc/terms/AgentClassdct:AgentClass Definition: A group of agents. Description Examples of Agent Class include groups seen as classes, such as students, women, charities, lecturers. rdfs:label Agent Class
Assethttp://www.w3.org/ns/adms#Assetadms:Asset Definition: An abstract entity that reflects the intellectual content of the asset and represents those characteristics of the asset that are independent of its physical embodiment. Description Assets can be versioned. Every time the intellectual content of an asset changes, the result is considered to be a new asset that can be linked to previous and next versions of the Asset. rdfs:label Asset skos:note This abstract entity combines the FRBR entities work (a distinct intellectual or artistic creation) and expression (the intellectual or artistic realization of a work) [ FRBR ].
Expressionhttp://iflastandards.info/ns/fr/frbr/frbrer/C1002frbrer:Expression Definition The intellectual or artistic realization of a work in the form of alpha-numeric, musical, or choreographic notation, sound, image, object, movement, etc., or any combination of such forms. rdfs:label Expression skos:note A particular version of the KOS, such as in a particular language or an abridgment.
Linguistic Systemhttp://purl.org/dc/terms/LinguisticSystemdct:LinguisticSystem Definition A system of signs, symbols, sounds, gestures, or rules used in communication. Description Examples include written, spoken, sign, and computer languages. rdfs:label Linguistic System
Manifestationhttp://iflastandards.info/ns/fr/frbr/frbrer/C1003frbrer:Manifestation Definition The physical embodiment of an expression of a work. rdfs:label Manifestation skos:note Examples are: the printed edition of a thesaurus' 2010 English version, the SKOS Linked Data representation of the same version.
Media Typehttp://purl.org/dc/terms/MediaTypedct:MediaTypeOrExtent Definition A file format or physical medium. rdfs:label Media Type
Rights Statementhttp://purl.org/dc/terms/RightsStatementdct:RightsStatement Definition A statement about the intellectual property rights (IPR) held in or over a Resource, a legal document giving official permission to do something with a resource, or a statement about access rights. rdfs:label Rights Statement
Themahttp://iflastandards.info/ns/fr/frsad/C1001frsad:Thema rdfs:comment Any entity used as a subject of a work. rdfs:label Thema skos:note A subject domain to which the KOS belongs. It can be a broad subject or any number of narrower subjects. Suggest to use a controlled vocabulary for those subjects.
Workhttp://iflastandards.info/ns/fr/frbr/frbrer/C1001frbrer:Work Definition A distinct intellectual or artistic creation. rdfs:label Work skos:note Usually a KOS as a whole is a work, e.g., ASIS&T Thesaurus.
Section 3. NKOS-AP Properties
Aligned withhttp://w3id.org/nkos#alignedWithnkos:alignedWith Definition A related resource with which the described resource is aligned. rdfs:domain rdfs:label Aligned With rdfs:range Expected value IRI of an expression
Based onhttp://w3id.org/nkos#basedOnnkos:basedOn Definition A resource used as the source for a derivative resource. rdfs:domain rdfs:label Based On rdfs:range Expected value IRI of a work
Service offeredhttp://w3id.org/nkos#serviceOfferednkos:serviceOffered Definition Services provided to users for the described resources. rdfs:domain rdfs:label Service Offered skos:note Example: download, extract, query, annotation. rdfs:range Expected value literal
Size Notehttp://w3id.org/nkos#sizeNotenkos:sizeNote Definition Number of concepts, terms, or other semantic units included in a KOS. rdfs:domain rdfs:label Size Note rdfs:range Expected value literal
Used Byhttp://w3id.org/nkos#usedBynkos:usedBy Definition Agent using the described KOS. rdfs:domain rdfs:label Used By rdfs:range Agent Class Expected value IRI of an agent
Update Frequencyhttp://w3id.org/nkos#updateFrequencynkos:updateFrequency Definition The period in which a KOS is typically updated. Description Suggest using DCMI Collection Description Frequency Vocabulary. (http://dublincore.org/groups/collections/frequency/) . rdfs:domain rdfs:label Update Frequency rdfs:range Expected value literal
Section 4. Re-used Properties
Audiencehttp://purl.org/dc/terms/audiencedct:audience rdfs:comment A class of entity for whom the resource is intended or useful. rdfs:domain rdfs:label Audience skos:note Recommend using a controlled vocabulary. rdfs:range Expected value IRI of an agent class.
Contacthttp://www.w3.org/ns/dcat#contactPointdcat:contactPoint Definition Links an asset to a contact point from where further information about an Asset can be obtained. rdfs:domain rdfs:label Contact rdfs:range Expected value literal
Date Createdhttp://purl.org/dc/terms/createddct:created Definition Date of creation of the resource. rdfs:domain rdfs:label Date Created skos:note Core element. For the date of a manifestation, use dct:issued rdfs:range Expected value literal
Creatorhttp://purl.org/dc/terms/creatordct:creator Definition An entity primarily responsible for making the resource. Description Examples of a Creator include a person, an organization, or a service. rdfs:domain rdfs:label Creator skos:note Core element rdfs:range Expected value IRI of an Agent
Described byhttp://www.w3.org/2007/05/powder-s#describedbywdrs:describedBy Definition The relationship A 'describedby' B asserts that resource B provides a description of resource A. Description There are no constraints on the format or representation of either A or B, neither are there any further constraints on either resource. rdfs:domain rdfs:label Described by rdfs:range Expected value IRI of a work; IRI of an expression
Descriptionhttp://purl.org/dc/terms/descriptiondct:description Definition An account of the resource. Description Description may include but is not limited to: an abstract, a table of contents, a graphical representation, or a free-text account of the resource. rdfs:domain rdfs:label Description rdfs:range Expected value literal
Formathttp://purl.org/dc/terms/formatdct:format Definition The file format, physical medium, or dimensions of the resource. Description Examples of dimensions include size and duration. Recommended best practice is to use a controlled vocabulary such as the list of Internet Media Types [MIME] http://www.iana.org/assignments/media-types/. rdfs:domain rdfs:label Format rdfs:range Expected value literal
Identifierhttp://purl.org/dc/terms/identifierdct:identifier Definition An unambiguous reference to the resource within a given context. Description Recommended best practice is to identify the resource by means of a string conforming to a formal identification system. rdfs:domain rdfs:label Identifier skos:note Core element rdfs:range Expected value identifier
Is embodiment ofhttp://iflastandards.info/ns/fr/frbr/frbrer/P2004frbrer:isEmbodimentOf Definition Relates a manifestation to an expression that is embodied in the manifestation. rdfs:domain rdfs:label Is embodiment of skos:note Core element rdfs:range Expected value IRI of an expression
Is Part Ofhttp://purl.org/dc/terms/isPartOfdct:isPartOf Definition A related resource in which the described resource is physically or logically included. rdfs:domain rdfs:label Is Part Of skos:note A related KOS, in which the described KOS is logically included. This is different from nkos:basedOn relationship type. Consult KOS Relation Vocabulary for examples and possible extended properties http://wiki.dublincore.org/index.php/NKOS_Vocabularies . rdfs:range Expected value IRI of a work; IRI of an expression; IRI of a manifestation
Is Realization Ofhttp://iflastandards.info/ns/fr/frbr/frbrer/P2002frbrer:isRealizationOf Definition Relates an expression to the work that is realized through the expression. rdfs:domain rdfs:label Is Realization Of skos:note Core element rdfs:range Expected value IRI of a work
Date Issuedhttp://purl.org/dc/terms/issueddct:issued Definition Date of formal issuance (e.g., publication) of the resource. rdfs:domain rdfs:label Date Issued skos:note Core element rdfs:range Expected value literal
Languagehttp://purl.org/dc/terms/languagedct:language Definition A language of the resource. Description Recommended best practice is to use a controlled vocabulary such as RFC 4646 [RFC4646]. rdfs:domain rdfs:label Language rdfs:range Expected value language code
Date Modifiedhttp://purl.org/dc/terms/modifieddct:modified rdfs:comment Date on which the resource was changed. rdfs:domain rdfs:label Date Modified rdfs:range Expected value literal
Publisherhttp://purl.org/dc/terms/publisherdct:publisher Definition An entity responsible for making the resource available. Description Examples of a Publisher include a person, an organization, or a service. rdfs:domain rdfs:label Publisher rdfs:range Expected value IRI of an agent
Relationhttp://purl.org/dc/terms/relationdct:relation rdfs:comment A related resource. Description Recommended best practice is to identify the related resource by means of a string conforming to a formal identification system. rdfs:domain rdfs:label Relation rdfs:range Expected value IRI of a work; IRI of an expression; IRI of a manifestation
Rightshttp://purl.org/dc/terms/rightsdct:rights Definition Information about rights held in and over the resource. Description Typically, rights information includes a statement about various property rights associated with the resource, including intellectual property rights. rdfs:domain rdfs:label Rights rdfs:range Expected value rights statement
Samplehttp://www.w3.org/ns/adms#sampleadms:sample Definition Links to a sample of an Asset (which is itself an Asset). rdfs:domain rdfs:label Sample skos:note A link to a fragment of the resource. rdfs:range Expected value IRI of an expression
Subjecthttp://purl.org/dc/terms/subjectdct:subject Definition The topic of the resource. Description Typically, the subject will be represented using keywords, key phrases, or classification codes. Recommended best practice is to use a controlled vocabulary. rdfs:domain rdfs:label Subject skos:note Core element rdfs:range Expected value IRI of a thema
Titlehttp://purl.org/dc/terms/titledct:title Definition A name given to the resource. rdfs:domain rdfs:label Title skos:note Core element rdfs:range Expected value literal
Typehttp://purl.org/dc/terms/typedct:type rdfs:comment The nature or genre of the resource. Description Recommended best practice is to use a controlled vocabulary. To describe the file format, physical medium, or dimensions of the resource, use the Format element. rdfs:domain rdfs:label Type skos:note rdfs:range Expected value IRI of a KOS type
Derived Fromhttp://www.w3.org/ns/prov#wasDerivedFromprov:wasDerivedFrom Definition A derivation is a transformation of an entity into another, an update of an entity resulting in a new one, or the construction of a new entity based on a pre-existing entity. rdfs:domain rdfs:label Derived From skos:note Derived From covers relationships between resources such as translation-of, abridgement-of, extension-of, and version-of. It is different from Part Of relationship type. Consult KOS Relation Vocabulary for examples and possible extended properties http://wiki.dublincore.org/index.php/NKOS_Vocabularies . rdfs:range Expected value IRI of an expression