Home › void
Last update: 
Wednesday, December 17, 2008 - 01:08
Authors: 
mhausenblas
Authors: 
Richard Cyganiak
Abstract: 
The Vocabulary of Interlinked Datasets (voiD) is a vocabulary and a set of instructions that enables the discovery and usage of linked datasets. A linked dataset is a collection of data, published and maintained by a single provider, available as RDF on the Web, where at least some of the resources in the dataset are identified by dereferencable URIs.

TODO

Define instances of type scovo:Dimension

- void:numberOfTriples - indicates that a scovo:Item represents a number of triples in the RDF sense.
- void:numberOfResources - indicates that a scovo:Item represents a number of resources in the RDF sense, for example instances of foaf:Person. Each of these resources will typically be identified with a distinct URI.
- void:numberOfDocuments - indicates that a scovo:Item represents a number of data-carrying documents, such as RDF/XML documents or RDFa-enabled web pages.

Mappings to external vocabularies

Some proposals:

void:technicalFeature rdfs:subPropertyOf dcterms:conformsTo .

void at a glance

void classes and properties

Class void:Dataset

Label: 
dataset

A dataset is a collection of data, published and maintained by a single provider, available as RDF on the Web, where at least some of the resources in the dataset are identified by dereferencable URIs.

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Class void:Linkset

Label: 
linkset

Describes the linking between two datasets modeled using a class. Note that this enables to attach further characteristics, that is, describe the interlinking in greater detail (such as statistics, etc.).

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Class void:TechnicalFeature

Label: 
technical feature

To express a certain technical feature of a dataset, such as formats (available in RDF/XML, etc.).

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Property void:statItem

Label: 
statistical item
Domain: 
Dataset

States a certain quantitative measure. Note that the range is http://purl.org/NET/scovo#Item .

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Property void:feature

Label: 
feature
Domain: 
Dataset
Range: 
TechnicalFeature

Defines which technical features a dataset supports.

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Property void:containsLinks

Label: 
contains link
Domain: 
Dataset
Range: 
Linkset

States that a dataset contain certain links.

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Property void:target

Label: 
has target
Domain: 
Linkset
Range: 
Dataset

States that a linkset has a certain dataset as its target.

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Property void:sparqlEndpoint

Label: 
has a SPARQL endpoint at
Domain: 
Dataset

Announcement of a SPARQL endpoint. Note that the range is a rdfs:Resource (a URI rather than a string).

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Property void:linkPredicate

Label: 
a link predicate
Domain: 
Linkset

States that the interlinking is about a certain RDF predicate. Note that the range is rdf:Property.

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Property void:exampleResource

Label: 
example resource of dataset
Domain: 
Dataset

Gives an example of a representative resource of a dataset. Note that the range is rdfs:Resource.

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Property void:vocabulary

Label: 
vocabulary
Domain: 
Dataset
Comment: 
A vocabulary that is used in the dataset.

This property links a void:Dataset to an RDFS vocabulary or OWL ontology whose classes and properties are used in the dataset.

Classes and properties are typically linked to their defining vocabulary using the rdfs:isDefinedBy property. The same URI that is used with rdfs:isDefinedBy to identify the vocabulary should also be used in the void:vocabulary statement.

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Property void:subjectsTarget

Label: 
has target where subjects are located
Domain: 
Linkset
Range: 
Dataset
Comment: 
The source target of an interlinking

For RDF properties such as foaf:based_near where the direction shall be stated explicitly this property is used to indicate the source of the interlinking.

Functional Property: 
Functional Property
Superproperty: 
target
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Property void:objectsTarget

Label: 
has target where objects are located
Domain: 
Linkset
Range: 
Dataset
Comment: 
The sink target of an interlinking

For RDF properties such as foaf:based_near where the direction shall be stated explicitly this property is used to indicate the sink of the interlinking.

Functional Property: 
Functional Property
Superproperty: 
target
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