SKOS Core is a model for expressing the basic structure and content of concept schemes such as thesauri, classification schemes, subject heading lists, taxonomies, 'folksonomies', other types of controlled vocabulary, and also concept schemes embedded in glossaries and terminologies.
The SKOS Core Vocabulary is an application of the Resource Description Framework (RDF), that can be used to express a concept scheme as an RDF graph. Using RDF allows
data to be linked to and/or merged with other data, enabling data sources to be
distributed across the web, but still be meaningfully composed and integrated.
This document gives a reference-style overview of the SKOS Core Vocabulary as it stands at the time of publication. It also describes the policies for ownership, naming, persistence and change by which the SKOS Core Vocabulary is managed.
This edition of the SKOS Core Vocabulary Specification is an Editor's Draft, prepared for discussion prior to Public Working Draft publication, and has no formal status within the W3C process.
See also the SKOS Core Guide.
Status of this Document
This section describes the status of this document at the time of its publication. Other documents may supersede this
document. A list of current W3C publications and the latest
revision of this technical report can be found in the W3C technical reports index at
http://www.w3.org/TR/.
@@TODO
The English language variant of this document is normative, all other language variants are informative.
Introduction
SKOS stands for Simple Knowledge Organisation System. The name SKOS was chosen to emphasise the goal of providing a simple yet powerful model for expressing knowledge organisation systems in a machine-understandable way, within the framework of the Semantic Web.
SKOS Core is a model for expressing the basic structure and content of concept schemes such as thesauri, classification schemes, subject heading lists, taxonomies, 'folksonomies', other types of controlled vocabulary, and also concept schemes embedded in glossaries and terminologies.
The SKOS Core Vocabulary is an application of the Resource Description Framework (RDF). RDF provides a simple data formalism for talking about things, their properties, inter-relationships, and categories (classes). Using RDF allows data to be linked to and/or merged with other RDF data by Semantic Web applications. In practice, this means that data sources can be distributed across the web in a decentralised way, but still be meaningfully composed and integrated by applications, often in novel and unanticipated ways. See RDF Concepts for an overview of RDF, RDF Semantics for its formal mathematical basis, and RDF Syntax for details of the RDF/XML document format used to exchange RDF data.
This document gives a reference-style overview of the SKOS Core Vocabulary as it stands at the time of publication. It also describes the policies for ownership, naming, persistence and change by which the SKOS Core Vocabulary is managed.
This edition of the SKOS Core Vocabulary Specification is an Editor's Draft, prepared for discussion prior to Public Working Draft publication, and has no formal status within the W3C process.
A formal representation of the SKOS Core Vocabulary is maintained in RDF/OWL [latest: http://www.w3.org/2004/02/skos/core]. Historical snapshots of the RDF/OWL description of the SKOS Core Vocabulary can be obtained from [http://www.w3.org/2004/02/skos/core/history/].
Translations
To obtain the definitive RDF/OWL description of the SKOS Core Vocabulary, serialised as RDF/XML, dereference the URI http://www.w3.org/2004/02/skos/core. This includes labels, comments and definitions in English only, which are normative.
To obtain labels, comments and definitions for classes and properties of the SKOS Core Vocabulary in another language, serialised as RDF/XML, dereference one of the following URIs:
Labels, definitions and comments in any language other than English are informative.
Corresponding language variants of this document are also available at the following links:
If you would like to submit a translation of labels, definitions and comments, or to make a comment on existing translations, send an email to public-esw-thes@w3.org.
See also the SKOS Core Translations web page.
Guide to Term Summary Tables
Each term (i.e. class or property) of the vocabulary is summarised in this document as a table. Each table may have the following rows:
Class or Property:
|
URI: |
The Universal Resource Identifier. |
Label: |
A human-readable label. |
Definition: |
An explanation of the meaning of a class or property. |
Comment: |
Additional information about meaning and/or proper use. |
Example: |
An example of the use of a class or property. |
Status: |
The status (stability level) of the class or property. |
Issued: |
Date on which the class or property was issued. |
Modified: |
Date on which the class or property was last modified. |
Super-classes: |
(Classes only) any declared super-classes. |
Super-properties: |
(Properties only) any declared super-properties. |
Domain: |
(Properties only) the declared domain for the property. |
Range: |
(Properties only) the declared range for the property. |
Characteristics: |
(Properties only) any declared logical characteristics for the property, e.g. Transitive, Symmetric, Functional, InverseFunctional. |
Inverse of: |
(Properties only) any declared inverse properties. |
Replaces: |
Any deprecated terms which the given term has replaced in recommended usage. |
Version info: |
A note about the modification and/or history of a class or property. |
Replaced By: |
(Deprecated terms only) the term to use instead of the deprecated term.
|
Deprecated: |
(Deprecated terms only) the date of last modification (i.e. deprecation) of the term. |
Policy Statements
N.B. The Working Group is committed to establishing clear expectations around the management of RDF vocabularies, through documentation of process and maintenance policies. This is itself an evolving process. Specifically, this document is itself situated within the W3C Process, and may change and evolve in the light of feedback on SKOS Core and on the SKOS Core policy statements. It should be noted that claims made by the Working Group using the (experimental) persistence and change terminology employed here have as their scope the currently chartered Working Group. They have only draft status within the wider W3C Process. W3C has not delegated to the Working Group any authority to make binding commitments on behalf of W3C beyond those implicit in the formal W3C Process.
Ownership
The W3C gives control over the SKOS Core Vocabulary to working groups within the overall framework of the W3C process. Currently that control resides with the Semantic Web Best Practices and Deployment Working Group, whose chairs have delegated responsibility for maintaining the SKOS Core Vocabulary to the editors of this specification (Alistair Miles and Dan Brickley). When this working group's charter expires, control will revert to W3C as an organization.
The Working Group is committed to a public, consensus-driven design environment for SKOS Core, and to this end conducts SKOS-related discussion in public, in particular drawing on feedback from the Semantic Web Interest Group mailing list public-esw-thes@w3.org.
Naming
The URI for the SKOS Core Vocabulary itself is:
http://www.w3.org/2004/02/skos/core
The URI for a class or property in the SKOS Core Vocabulary is constructed by appending a fragment identifier to the URI for the SKOS Core Vocabulary. E.g.
http://www.w3.org/2004/02/skos/core#Concept
http://www.w3.org/2004/02/skos/core#prefSymbol
A fragment identifier for a class always starts with an uppercase character. Where the fragment identifier is comprised of multiple concatenated words, the leading character of each word will be an uppercase character. E.g.
Concept
ConceptScheme
The fragment identifier for a property starts with a lowercase character. Where the fragment identifier is comprised of multiple concatenated words, the leading character of the second and each subsequent word will be an uppercase character. E.g.
subject
prefLabel
isPrimarySubjectOf
Persistence
All editions of the SKOS Core Vocabulary Specification, all editions of the SKOS Core Guide, and the RDF/OWL description of the SKOS Core Vocabulary [http://www.w3.org/2004/02/skos/core] are all declared to be persistent resources, as defined by the persistence policy at [http://www.w3.org/Consortium/Persistence].
Change
The SKOS Core Vocabulary may change. The process for managing changes to the SKOS Core Vocabulary during the chartered lifetime of the Working Group is described below:
- The Working Group undertakes to review the SKOS Core Vocabulary Specification and the SKOS Core Guide at intervals of 2 months. Subsequent to each review, new Public Working Draft editions of the SKOS Core Guide and the SKOS Core Vocabulary Specification will be published by the Working Group.
- In the interim period between publication of Public Working Draft editions of the SKOS Core Guide and the SKOS Core Vocabulary Specification (hereafter 'the interim period'), no changes will be made to the SKOS Core Vocabulary. The formal RDF/OWL description of the SKOS Core Vocabulary [http://www.w3.org/2004/02/skos/core] will therefore also remain unchanged during this period.
- In the interim period, the editor's will maintain a
public list of proposed changes to the SKOS Core Vocabulary to be put forward at the next review.
- Members of the public may make proposals for change, or comment on current proposals, by sending an email to the publicly archived Semantic Web Interest Group mailing list public-esw-thes@w3.org [archive].
- Proposed changes to be put forward for review will be published at least 2 weeks before a scheduled review, to allow time for public comment.
- At each review, the list of proposed changes to the SKOS Core Vocabulary is presented to the reviewers delegated by the Working Group for approval.
- Those changes approved by the reviewers, or approved in a modified form after negotiation between the editors and the reviewers, will be implemented by the editors. New Public Working Draft editions of the SKOS Core Guide and SKOS Core Vocabulary Specification, reflecting these changes, will then be published by the Working Group. Approved changes will also be implemented in the formal representation of the SKOS Core Vocabulary in RDF/OWL [http://www.w3.org/2004/02/skos/core]. Therefore the formal representation of the SKOS Core Vocabulary in RDF/OWL [http://www.w3.org/2004/02/skos/core] will always be consistent with the latest Public Working Draft editions of the SKOS Core Guide and the SKOS Core Vocabulary Specification.
- All changes made will also be reported on the SKOS Change Log [http://esw.w3.org/mt/esw/archives/cat_skos_changelog.html].
Furthermore, at any given time only certain types of change are allowed (following the example of the DCMI namespace policy [http://dublincore.org/documents/dcmi-namespace/]). The types of change allowed depend on the 'status' of the class or property to which the change relates. The status of a class or property may take one of three values:
- unstable
- The term is unstable, and feedback is welcomed on its current form and utility. It may currently be poorly defined. Its meaning and/or form may be expected to change at any time. Do not implement mission critical systems that depend on this term persisting in its current form. (Changes corresponding to DCMI Namespace Policy types A, B or C may occur.)
- testing
- The term has gone beyond the raw proposal stage, and is undergoing testing. This term may still change in response to feedback from testing, although it may be expected not to undergo any radical change. The cost to early implementors of changing the term will be considered, however the goal of achieving wider interoperability and long-term stability may override those considerations. (Changes corresponding to DCMI Namespace Policy types A or B may occur.)
- stable
- No substantial (i.e. meaning-changing) alterations will take place. Implementors can expect the term to persist in its current form indefinitely. (Minor editorial changes corresponding to DCMI Namespace Policy type A may occur.)
New classes or properties may be added to the SKOS Core Vocabulary (changes corresponding to DCMI Namespace Policy type D), in accordance with the process described above.
A class or property at any of the above status levels may be marked as deprecated, in which case instructions will be given on what to use in its place. A deprecated class property may be expected to remain unchanged indefinitely.
Historical versions (snapshots) of the SKOS Core Vocabulary are maintained, and can be accessed via the web page at [http://www.w3.org/2004/02/skos/core/history/].
Release Notes
The following changes have been made since the previous (first) W3C Public Working Draft edition of the SKOS Core Vocabulary Specification:
Change 1: Use of skos:subjectIndicator
The property skos:subjectIndicator
was
previously used internally within the RDF/OWL description of the SKOS Core
Vocabulary, to make statements about the other classes and properties of the
SKOS Core Vocabulary. This usage, however, has implications which were both
inconvenient and contentious, and has been removed. This change should not
have any significant impact, and does not alter recommended usage as described in the SKOS Core Guide.
See [subjectIndicatorUse-1]
for a description of the original change proposal.
Change 2: Documentation Properties
The properties skos:publicNote
and
skos:privateNote
have been deprecated. They
are replaced by the property skos:note
. See
the Documentation Properties section of the SKOS Core Guide for
recommended usage. An example has been added to the Documentation Properties section of the Guide, illustrating
the use of the dc:audience
property to specify the intended
audience of a particular note.
The motivation behind this change is to allow the function of a note to be
specified independently from the intended audience, allowing for example
different definitions for different audiences.
See [notes-2] for
a description of the original change proposal.
Change 3: Range of Symbolic Labelling Properties
The range of the properties skos:prefSymbol
and skos:altSymbol
has been changed from
foaf:Image
to dcmitype:Image
. This change should
not have any significant impact, and has been made purely because of the
greater stability of the DCMI type vocabulary at this time.
Also, a new property skos:symbol
('symbolic label') has been added, as the super-property of both skos:prefSymbol
('preferred symbolic label') and skos:altSymbol
('alternative symbolic label'). The skos:symbol
property is roughly analagous to rdfs:label
, but for labelling a
resource with an image resource instead of an RDF literal. The addition of
the skos:symbol
property does not alter recommended usage of skos:prefSymbol
and skos:altSymbol
as described in the SKOS Core Guide.
See [symbolicLabelsRange-3]
for a description of the original change proposal.
Change 4: Translations
Labels, comments and definitions for the classes and properties of the
SKOS Core Vocabulary are now available as RDF in the following languages: French [fr], German [de], Dutch [nl] and Portuguese [pt]. Links have
been added from the SKOS Core RDFS/OWL description to these additional
sources. Corresponding language variants of this document are also available. This change does not alter recommended
usage as described in the SKOS Core Guide.
See [seeAlsoTranslations-4]
for a description of the original change proposal.
Classes
Class:CollectableProperty
|
URI: |
http://www.w3.org/2004/02/skos/core#CollectableProperty |
Label: |
Collectable Property |
Definition: |
A property which can be used with a skos:Collection. |
Comment: |
The following rule applies for this property: [(?x ?p ?c) (?c skos:member ?y) (?p rdf:type skos:CollectableProperty) implies (?x ?p ?y)] |
Examples: |
[link]
|
Status: |
unstable |
Issued: |
2004-10-20 |
Modified: |
2005-09-29 |
Class:Collection
|
URI: |
http://www.w3.org/2004/02/skos/core#Collection |
Label: |
Collection |
Definition: |
A meaningful collection of concepts. |
Comment: |
Labelled collections can be used with collectable semantic relation properties e.g. skos:narrower, where you would like a set of concepts to be displayed under a 'node label' in the hierarchy. |
Examples: |
[link]
|
Status: |
unstable |
Issued: |
2004-10-20 |
Modified: |
2005-09-29 |
Class:Concept
|
URI: |
http://www.w3.org/2004/02/skos/core#Concept |
Label: |
Concept |
Definition: |
An abstract idea or notion; a unit of thought. |
Examples: |
[link]
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-09-29 |
Class:ConceptScheme
|
URI: |
http://www.w3.org/2004/02/skos/core#ConceptScheme |
Label: |
Concept Scheme |
Definition: |
A set of concepts, optionally including statements about semantic relationships between those concepts. |
Comment: |
Thesauri, classification schemes, subject heading lists, taxonomies, 'folksonomies', and other types of controlled vocabulary are all examples of concept schemes. Concept schemes are also embedded in glossaries and terminologies. |
Comment: |
A concept scheme may be defined to include concepts from different sources. |
Examples: |
[link]
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-10-14 |
Class:OrderedCollection
|
URI: |
http://www.w3.org/2004/02/skos/core#OrderedCollection |
Label: |
Ordered Collection |
Definition: |
An ordered collection of concepts, where both the grouping and the ordering are meaningful. |
Comment: |
Ordered collections can be used with collectable semantic relation properties, where you would like a set of concepts to be displayed in a specific order, and optionally under a 'node label'. |
Examples: |
[link]
|
Super-classes: |
Collection
|
Status: |
unstable |
Issued: |
2004-10-20 |
Modified: |
2005-09-29 |
Properties
Property:altLabel
|
URI: |
http://www.w3.org/2004/02/skos/core#altLabel |
Label: |
alternative label |
Definition: |
An alternative lexical label for a resource. |
Comment: |
Acronyms, abbreviations, spelling variants, and irregular plural/singular forms may be included among the alternative labels for a concept. Mis-spelled terms are normally included as hidden labels (see skos:hiddenLabel). |
Examples: |
[link]
|
Super-properties: |
http://www.w3.org/2000/01/rdf-schema#label
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-09-29 |
Property:altSymbol
|
URI: |
http://www.w3.org/2004/02/skos/core#altSymbol |
Label: |
alternative symbolic label |
Definition: |
An alternative symbolic label for a resource. |
Examples: |
[link]
|
Super-properties: |
symbol
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-10-06 |
Property:broader
|
URI: |
http://www.w3.org/2004/02/skos/core#broader |
Label: |
has broader |
Definition: |
A concept that is more general in meaning. |
Comment: |
Broader concepts are typically rendered as parents in a concept hierarchy (tree). |
Examples: |
[link]
|
Super-properties: |
semanticRelation
|
Characteristics: |
Transitive |
Inverse of: |
narrower
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-09-29 |
Property:changeNote
|
URI: |
http://www.w3.org/2004/02/skos/core#changeNote |
Label: |
change note |
Definition: |
A note about a modification to a concept. |
Examples: |
[link]
|
Super-properties: |
note
|
Status: |
unstable |
Issued: |
2004-10-21 |
Modified: |
2005-10-05 |
Property:definition
|
URI: |
http://www.w3.org/2004/02/skos/core#definition |
Label: |
definition |
Definition: |
A statement or formal explanation of the meaning of a concept. |
Examples: |
[link]
|
Super-properties: |
note
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-10-05 |
Property:editorialNote
|
URI: |
http://www.w3.org/2004/02/skos/core#editorialNote |
Label: |
editorial note |
Definition: |
A note for an editor, translator or maintainer of the vocabulary. |
Examples: |
[link]
|
Super-properties: |
note
|
Status: |
unstable |
Issued: |
2004-10-21 |
Modified: |
2005-10-05 |
Property:example
|
URI: |
http://www.w3.org/2004/02/skos/core#example |
Label: |
example |
Definition: |
An example of the use of a concept. |
Examples: |
[link]
|
Super-properties: |
note
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-10-05 |
Property:hasTopConcept
|
URI: |
http://www.w3.org/2004/02/skos/core#hasTopConcept |
Label: |
has top concept |
Definition: |
A top level concept in the concept scheme. |
Examples: |
[link]
|
Domain: |
ConceptScheme
|
Range: |
Concept
|
Status: |
testing |
Issued: |
2004-08-19 |
Modified: |
2005-09-29 |
Replaces: |
TopConcept
|
Property:hiddenLabel
|
URI: |
http://www.w3.org/2004/02/skos/core#hiddenLabel |
Label: |
hidden label |
Definition: |
A lexical label for a resource that should be hidden when generating visual displays of the resource, but should still be accessible to free text search operations. |
Examples: |
[link]
|
Super-properties: |
http://www.w3.org/2000/01/rdf-schema#label
|
Status: |
unstable |
Issued: |
2004-12-15 |
Modified: |
2005-09-29 |
Property:historyNote
|
URI: |
http://www.w3.org/2004/02/skos/core#historyNote |
Label: |
history note |
Definition: |
A note about the past state/use/meaning of a concept. |
Examples: |
[link]
|
Super-properties: |
note
|
Status: |
unstable |
Issued: |
2004-10-21 |
Modified: |
2005-10-05 |
Property:inScheme
|
URI: |
http://www.w3.org/2004/02/skos/core#inScheme |
Label: |
in scheme |
Definition: |
A concept scheme in which the concept is included. |
Comment: |
A concept may be a member of more than one concept scheme. |
Examples: |
[link]
|
Domain: |
Concept
|
Range: |
ConceptScheme
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-09-29 |
Property:isPrimarySubjectOf
|
URI: |
http://www.w3.org/2004/02/skos/core#isPrimarySubjectOf |
Label: |
is primary subject of |
Definition: |
A resource for which the concept is the primary subject. |
Examples: |
[link]
|
Super-properties: |
isSubjectOf
|
Inverse of: |
primarySubject
|
Status: |
unstable |
Issued: |
2004-10-22 |
Modified: |
2005-09-29 |
Property:isSubjectOf
|
URI: |
http://www.w3.org/2004/02/skos/core#isSubjectOf |
Label: |
is subject of |
Definition: |
A resource for which the concept is a subject. |
Examples: |
[link]
|
Domain: |
Concept
|
Inverse of: |
subject
|
Status: |
unstable |
Issued: |
2004-10-22 |
Modified: |
2005-09-29 |
Property:member
|
URI: |
http://www.w3.org/2004/02/skos/core#member |
Label: |
member |
Definition: |
A member of a collection. |
Examples: |
[link]
|
Domain: |
Collection
|
Range: |
http://www.w3.org/1999/02/22-rdf-syntax-ns#Resource
|
Status: |
unstable |
Issued: |
2004-10-20 |
Modified: |
2005-09-29 |
Property:memberList
|
URI: |
http://www.w3.org/2004/02/skos/core#memberList |
Label: |
member list |
Definition: |
An RDF list containing the members of an ordered collection. |
Comment: |
The following rule applies for this property: [(?c skos:memberList ?l) elementOfList(?e,?l) implies (?c skos:member ?e)] |
Examples: |
[link]
|
Domain: |
OrderedCollection
|
Range: |
http://www.w3.org/1999/02/22-rdf-syntax-ns#List
|
Status: |
unstable |
Issued: |
2004-10-20 |
Modified: |
2005-09-29 |
Property:narrower
|
URI: |
http://www.w3.org/2004/02/skos/core#narrower |
Label: |
has narrower |
Definition: |
A concept that is more specific in meaning. |
Comment: |
Narrower concepts are typically rendered as children in a concept hierarchy (tree). |
Examples: |
[link]
|
Super-properties: |
semanticRelation
|
Characteristics: |
Transitive |
Inverse of: |
broader
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-09-29 |
Property:note
|
URI: |
http://www.w3.org/2004/02/skos/core#note |
Label: |
note |
Definition: |
A general note, for any purpose. |
Comment: |
This property may be used directly, or as a super-property for more specific note types. |
Examples: |
[link]
|
Status: |
unstable |
Issued: |
2005-10-05 |
Replaces: |
publicNote
privateNote
|
Property:prefLabel
|
URI: |
http://www.w3.org/2004/02/skos/core#prefLabel |
Label: |
preferred label |
Definition: |
The preferred lexical label for a resource, in a given language. |
Comment: |
No two concepts in the same concept scheme may have the same value for skos:prefLabel in a given language. |
Examples: |
[link]
|
Super-properties: |
http://www.w3.org/2000/01/rdf-schema#label
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-09-29 |
Property:prefSymbol
|
URI: |
http://www.w3.org/2004/02/skos/core#prefSymbol |
Label: |
preferred symbolic label |
Definition: |
The preferred symbolic label for a resource. |
Comment: |
No two concepts in the same concept scheme may have the same value for skos:prefSymbol. |
Examples: |
[link]
|
Super-properties: |
symbol
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-10-06 |
Property:primarySubject
|
URI: |
http://www.w3.org/2004/02/skos/core#primarySubject |
Label: |
has primary subject |
Definition: |
A concept that is the primary subject of the resource. |
Comment: |
A resource may have only one primary subject per concept scheme. |
Examples: |
[link]
|
Super-properties: |
subject
|
Inverse of: |
isPrimarySubjectOf
|
Status: |
unstable |
Issued: |
2004-10-22 |
Modified: |
2005-09-29 |
Property:related
|
URI: |
http://www.w3.org/2004/02/skos/core#related |
Label: |
related to |
Definition: |
A concept with which there is an associative semantic relationship. |
Examples: |
[link]
|
Super-properties: |
semanticRelation
http://www.w3.org/2000/01/rdf-schema#seeAlso
|
Characteristics: |
Symmetric |
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-09-29 |
Property:scopeNote
|
URI: |
http://www.w3.org/2004/02/skos/core#scopeNote |
Label: |
scope note |
Definition: |
A note that helps to clarify the meaning of a concept. |
Examples: |
[link]
|
Super-properties: |
note
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-10-05 |
Property:semanticRelation
|
URI: |
http://www.w3.org/2004/02/skos/core#semanticRelation |
Label: |
semantic relation |
Definition: |
A concept related by meaning. |
Comment: |
This property should not be used directly, but as a super-property for all properties denoting a relationship of meaning between concepts. |
Examples: |
[link]
|
Domain: |
Concept
|
Range: |
Concept
|
Status: |
testing |
Issued: |
2004-03-26 |
Modified: |
2005-09-29 |
Property:subject
|
URI: |
http://www.w3.org/2004/02/skos/core#subject |
Label: |
has subject |
Definition: |
A concept that is a subject of the resource. |
Comment: |
The following rule may be applied for this property: [(?d skos:subject ?x)(?x skos:broader ?y) implies (?d skos:subject ?y)] |
Examples: |
[link]
|
Range: |
Concept
|
Super-properties: |
http://purl.org/dc/elements/1.1/subject
|
Inverse of: |
isSubjectOf
|
Status: |
unstable |
Issued: |
2004-10-22 |
Modified: |
2005-09-29 |
Property:subjectIndicator
|
URI: |
http://www.w3.org/2004/02/skos/core#subjectIndicator |
Label: |
subject indicator |
Definition: |
A subject indicator for a concept. [The notion of 'subject indicator' is defined here with reference to the latest definition endorsed by the OASIS Published Subjects Technical Committee.] |
Comment: |
This property allows subject indicators to be used for concept identification in place of or in addition to directly assigned URIs. |
Examples: |
[link]
|
Domain: |
Concept
|
Range: |
http://xmlns.com/foaf/0.1/Document
|
Characteristics: |
Inverse Functional |
Status: |
unstable |
Issued: |
2004-11-11 |
Modified: |
2005-09-29 |
Property:symbol
|
URI: |
http://www.w3.org/2004/02/skos/core#symbol |
Label: |
symbolic label |
Definition: |
An image that is a symbolic label for the resource. |
Comment: |
This property is roughly analagous to rdfs:label, but for labelling resources with images that have retrievable representations, rather than RDF literals. |
Examples: |
[link]
|
Domain: |
http://www.w3.org/1999/02/22-rdf-syntax-ns#Resource
|
Range: |
http://purl.org/dc/dcmitype/Image
|
Status: |
unstable |
Issued: |
2005-10-06 |
Deprecated Classes and Properties
Deprecated Class:TopConcept
|
URI: |
http://www.w3.org/2004/02/skos/core#TopConcept |
Issued: |
2004-03-26 |
Deprecated: |
2004-08-19 |
Replaced By: |
hasTopConcept
|
Version info: |
This class is now deprecated. To indicate that a concept is a top concept in a scheme, now use the skos:hasTopConcept property. |
Deprecated Property:broaderGeneric
|
URI: |
http://www.w3.org/2004/02/skos/core#broaderGeneric |
Issued: |
2004-03-26 |
Deprecated: |
2004-10-18 |
Replaced By: |
http://www.w3.org/2004/02/skos/extensions#broaderGeneric
|
Version info: |
This term has been moved to the 'SKOS Extensions' vocabulary. See http://www.w3.org/2004/02/skos/extensions/ |
Deprecated Property:broaderInstantive
|
URI: |
http://www.w3.org/2004/02/skos/core#broaderInstantive |
Issued: |
2004-03-26 |
Deprecated: |
2004-10-18 |
Replaced By: |
http://www.w3.org/2004/02/skos/extensions#broaderInstantive
|
Version info: |
This term has been moved to the 'SKOS Extensions' vocabulary. See http://www.w3.org/2004/02/skos/extensions/ |
Deprecated Property:broaderPartitive
|
URI: |
http://www.w3.org/2004/02/skos/core#broaderPartitive |
Issued: |
2004-03-26 |
Deprecated: |
2004-10-18 |
Replaced By: |
http://www.w3.org/2004/02/skos/extensions#broaderPartitive
|
Version info: |
This term has been moved to the 'SKOS Extensions' vocabulary. See http://www.w3.org/2004/02/skos/extensions/ |
Deprecated Property:externalID
|
URI: |
http://www.w3.org/2004/02/skos/core#externalID |
Issued: |
2004-03-26 |
Deprecated: |
2004-10-20 |
Replaced By: |
http://purl.org/dc/elements/1.1/identifier
|
Version info: |
This property is now deprecated. Use dc:identifier instead. |
Deprecated Property:narrowerGeneric
|
URI: |
http://www.w3.org/2004/02/skos/core#narrowerGeneric |
Issued: |
2004-03-26 |
Deprecated: |
2004-10-18 |
Replaced By: |
http://www.w3.org/2004/02/skos/extensions#narrowerGeneric
|
Version info: |
This term has been moved to the 'SKOS Extensions' vocabulary. See http://www.w3.org/2004/02/skos/extensions/ |
Deprecated Property:narrowerInstantive
|
URI: |
http://www.w3.org/2004/02/skos/core#narrowerInstantive |
Issued: |
2004-03-26 |
Deprecated: |
2004-10-18 |
Replaced By: |
http://www.w3.org/2004/02/skos/extensions#narrowerInstantive
|
Version info: |
This term has been moved to the 'SKOS Extensions' vocabulary. See http://www.w3.org/2004/02/skos/extensions/ |
Deprecated Property:narrowerPartitive
|
URI: |
http://www.w3.org/2004/02/skos/core#narrowerPartitive |
Issued: |
2004-03-26 |
Deprecated: |
2004-10-18 |
Replaced By: |
http://www.w3.org/2004/02/skos/extensions#narrowerPartitive
|
Version info: |
This term has been moved to the 'SKOS Extensions' vocabulary. See http://www.w3.org/2004/02/skos/extensions/ |
Deprecated Property:privateNote
|
URI: |
http://www.w3.org/2004/02/skos/core#privateNote |
Issued: |
2004-10-21 |
Deprecated: |
2005-10-05 |
Replaced By: |
note
|
Version info: |
This property now replaced by skos:note. To describe a note for a particular audience (e.g. 'editor', 'indexer', 'general user') use a note property with a related resource description and the dc:audience property. |
Deprecated Property:publicNote
|
URI: |
http://www.w3.org/2004/02/skos/core#publicNote |
Issued: |
2004-10-21 |
Deprecated: |
2005-10-05 |
Replaced By: |
note
|
Version info: |
This property now replaced by skos:note. To describe a note for a particular audience (e.g. 'editor', 'indexer', 'general user') use a note property with a related resource description and the dc:audience property. |
Deprecated Property:relatedHasPart
|
URI: |
http://www.w3.org/2004/02/skos/core#relatedHasPart |
Issued: |
2004-03-26 |
Deprecated: |
2004-10-18 |
Replaced By: |
http://www.w3.org/2004/02/skos/extensions#relatedHasPart
|
Version info: |
This term has been moved to the 'SKOS Extensions' vocabulary. See http://www.w3.org/2004/02/skos/extensions/ |
Deprecated Property:relatedPartOf
|
URI: |
http://www.w3.org/2004/02/skos/core#relatedPartOf |
Issued: |
2004-03-26 |
Deprecated: |
2004-10-18 |
Replaced By: |
http://www.w3.org/2004/02/skos/extensions#relatedPartOf
|
Version info: |
This term has been moved to the 'SKOS Extensions' vocabulary. See http://www.w3.org/2004/02/skos/extensions/ |
Acknowledgements
This work has benefited greatly from contributions made by members of the public-esw-thes@w3.org mailing list. Their feedback, suggestions and encouragement are gratefully acknowledged. SKOS Core draws heavily on conventions and traditions in the thesaurus and library communities, whose practitioners have very generously shared their experiences and insights during the design of SKOS Core.
The following are gratefully acknowledged for their translations: Thomas Bandholtz, Bernard Vatant, Mark van Assem, Tiago Murakami.