Core Elements

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NKOS AP Domain Model

This is a domain model that help the group to sort out the entities and attributes. It is not the final model. NkosAPDomainModel.png

NKOS AP Entity Relationships

Updated 2013-05-12

Refer to KOS Relation-Type Vocabulary at NKOS_Vocabularies page


Note: These are identified relationships between Work, Expression, and Manifestation entities. For an example of a thesaurus, see: KOS_example

W   E   M  
(work) (expression) (manifestation)
1. based on (w) 1. realizes (w) 1. embodies (E)
2. part of (w) 2. part of (E) 2. part of (M)
 . outline
. excerpt
. fragment of
3. based on (E)
. translation of
. abridgment of
. extension of
. version of
4. other (E)
. aligned with


NKOS Attributes and Metadata Elements Overview

(The core elements were identified based on the previous studies of over 10 KOS registries and a survey of related researchers and implementors) Updated 2013-09-09: changed "size" to "sizeNote"; added "usedBy" to work level; added "#" to "audience". See also NKOS AP Elements Defined

Symbols used in the following tables:

  • Requirement: *:required **:required, may occur in any level
  • Values: #:non literal; ##: both literal and non literal

(Note: the non literal constraint is inherited from the property defined by DCTerms. Those without marks have no clear definition of constraint.)


Attributes of Work


Attributes of Work *core Metadata Elements #:non-literal
      ##: both literal and non-literal 
       
Title * dct:title ##
Identifier * dct:identifier  
Description   dct:description  
Type of KOS * nkos:kosType ##
Creator * dct:creator/dc:creator #/##
Rights * dct:rights  
Subject * dct:subject #
Audience   dct:audience #
Date   dct:created  
Used by   nkos:usedBy #
Relation   dct:relation #
is part of   dct:isPartOf #
is based on   dct:relation #
Supporting documentation   wdrs:describedBy #


Attributes of Expression

Attributes of Expression *core Metadata Elements #:non-literal
    ##: both literal and non-literal
Title * dct:title ##
Identifier * dct:identifier  
Contact   adms:contactPoint ##
Description   dct:description  
Creator * dct:creator/dc:creator #/##
Language   dct:language #
Size note   nkos:sizeNote  
Date * dct:created  
    dct:modified  
Rights * dct:rights  
Used by   nkos:usedBy #
Frequency of update   nkos:updateFrequency  
Audience   dct:audience  
       
Relation   dct:relation #
is realization of * frbrer:isRealizationOf #
is part of   dct:isPartOf #
sample    adms:sample #
Supporting documentation   wdrs:describedby #


Attributes of Manifestation

Attributes of Manifestation *core Metadata Elements #:non-literal
      ##: both literal and non-literal
Title * dct:title ##
Identifier * dct:identifier  
Contact   adms:contactPoint ##
Description   dct:description  
Creator * dct:creator/dc:creator #/##
Publisher * dct:publisher/dc:publisher #/##
Format * dct:format  
Rights * dct:rights  
Date  * dct:issued  
Services offered   nkos:serviceOffered  
       
Relation   dct:relation #
Is embodiment of * frbrer:isEmbodimentOf #
Is part of   dct:isPartOf #
sample    adms:sample #
Supporting documentation   wdrs:describedBy #
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