Networked Knowledge Organization Systems

Dublin Core Application Profile

(NKOS AP)

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

Scope

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

adms http://www.w3.org/ns/adms#
dcat http://www.w3.org/ns/dcat#
dct http://purl.org/dc/terms/
frbrer http://iflastandards.info/ns/fr/frbr/frbrer/
frsad  http://iflastandards.info/ns/fr/frsad/
nkos http://w3id.org/nkos#
prov http://www.w3.org/ns/prov#
wdrs http://www.w3.org/2007/05/powder-s#

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

Properties

-nkos defined:

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

Agent
http://purl.org/dc/terms/Agent
dct: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 Class
http://purl.org/dc/terms/AgentClass
dct: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

 

Asset
http://www.w3.org/ns/adms#Asset
adms: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 ].

 

Expression
http://iflastandards.info/ns/fr/frbr/frbrer/C1002
frbrer: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 System
http://purl.org/dc/terms/LinguisticSystem
dct: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

 

Manifestation
http://iflastandards.info/ns/fr/frbr/frbrer/C1003
frbrer: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 Type
http://purl.org/dc/terms/MediaType
dct:MediaTypeOrExtent
Definition
A file format or physical medium.
rdfs:label
Media Type

 

Rights Statement
http://purl.org/dc/terms/RightsStatement
dct: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

 

Thema
http://iflastandards.info/ns/fr/frsad/C1001
frsad: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.

 

Work
http://iflastandards.info/ns/fr/frbr/frbrer/C1001
frbrer: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 with
http://w3id.org/nkos#alignedWith
nkos: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 on
http://w3id.org/nkos#basedOn
nkos: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 offered
http://w3id.org/nkos#serviceOffered
nkos: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 Note
http://w3id.org/nkos#sizeNote
nkos: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 By
http://w3id.org/nkos#usedBy
nkos:usedBy
Definition
Agent using the described KOS.
rdfs:domain
rdfs:label
Used By
rdfs:range Agent Class
Expected value IRI of an agent

 

Update Frequency
http://w3id.org/nkos#updateFrequency
nkos: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

Audience
http://purl.org/dc/terms/audience
dct: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.

 

Contact
http://www.w3.org/ns/dcat#contactPoint
dcat: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 Created
http://purl.org/dc/terms/created
dct: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

 

Creator
http://purl.org/dc/terms/creator
dct: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 by
http://www.w3.org/2007/05/powder-s#describedby
wdrs: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

 

Description
http://purl.org/dc/terms/description
dct: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

 

Format
http://purl.org/dc/terms/format
dct: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


Identifier
http://purl.org/dc/terms/identifier
dct: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 of
http://iflastandards.info/ns/fr/frbr/frbrer/P2004
frbrer: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 Of
http://purl.org/dc/terms/isPartOf
dct: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 Of
http://iflastandards.info/ns/fr/frbr/frbrer/P2002
frbrer: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 Issued
http://purl.org/dc/terms/issued
dct: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

 

Language
http://purl.org/dc/terms/language
dct: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 Modified
http://purl.org/dc/terms/modified
dct:modified
rdfs:comment
Date on which the resource was changed.
rdfs:domain
rdfs:label
Date Modified
rdfs:range
Expected value literal

 

Publisher
http://purl.org/dc/terms/publisher
dct: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


Relation
http://purl.org/dc/terms/relation
dct: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  

 

Rights
http://purl.org/dc/terms/rights
dct: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

 

Sample
http://www.w3.org/ns/adms#sample
adms: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

 

Subject
http://purl.org/dc/terms/subject
dct: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

 

Title
http://purl.org/dc/terms/title
dct:title
Definition
A name given to the resource.
rdfs:domain
rdfs:label
Title
skos:note
Core element
rdfs:range
Expected value literal

 

Type
http://purl.org/dc/terms/type
dct: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
Type of knowledge organization system or structure. Recommend use of KOS Types Vocabulary [http://w3id.org/nkos/nkostype ]. Core element.
rdfs:range
Expected value IRI of a KOS type



Derived From
http://www.w3.org/ns/prov#wasDerivedFrom
prov: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