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.
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-lit | |||||
| 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 | # |