Vocabulary of Interlinked Datasets (VoID)

URI: http://vocab.deri.ie/void
Publisher(s): Digital Enterprise Research Institute, NUI Galway
Creator(s): Jun Zhao (jun.zhao@zoo.ox.ac.uk) of Department of Zoology, University of Oxford
Keith Alexander (Keith.Alexander@talis.com) of Talis
Michael Hausenblas (michael.hausenblas@deri.org) of LiDRC
Richard Cyganiak (richard.cyganiak@deri.org) of Digital Enterprise Research Institute, NUI Galway
Created: 2010-01-26
Modified: 2011-03-06
Ontology RDF: RDF (turtle)

Description

The Vocabulary of Interlinked Datasets (VoID) is an RDF Schema vocabulary for expressing metadata about RDF datasets. It is intended as a bridge between the publishers and users of RDF data, with applications ranging from data discovery to cataloging and archiving of datasets. This document provides a formal definition of the new RDF classes and properties introduced for VoID. It is a companion to the main specification document for VoID, Describing Linked Datasets with the VoID Vocabulary.

Figure 1: Ontology class hierarchy

dataset^c

URI	`http://rdfs.org/ns/void#Dataset`
Description	A set of RDF triples that are published, maintained or aggregated by a single provider.
Sub-classes	void:Linkset^c
In domain of	void:properties^dp void:vocabulary^op void:uriRegexPattern void:feature^op void:classes^dp void:distinctSubjects^dp void:entities^dp void:subset^op void:uriSpace^dp void:classPartition^op void:uriLookupEndpoint^op void:property^fp void:dataDump^op void:distinctObjects^dp void:exampleResource^op void:class^fp void:rootResource^op void:sparqlEndpoint^op void:openSearchDescription^op void:propertyPartition^op void:documents^dp void:triples^dp
In range of	void:subjectsTarget^fp void:propertyPartition^op void:inDataset^op void:target^op void:objectsTarget^fp void:subset^op void:classPartition^op

dataset description^c

URI	`http://rdfs.org/ns/void#DatasetDescription`
Description	A web resource whose foaf:primaryTopic or foaf:topics include void:Datasets.
Super-classes	foaf:Document^c

linkset^c

URI	`http://rdfs.org/ns/void#Linkset`
Description	A collection of RDF links between two void:Datasets.
Super-classes	void:Dataset^c
In domain of	void:target^op void:objectsTarget^fp void:linkPredicate^op void:subjectsTarget^fp

technical feature^c

URI	`http://rdfs.org/ns/void#TechnicalFeature`
Description	A technical feature of a void:Dataset, such as a supported RDF serialization format.
In range of	void:feature^op

Figure 2: Ontology onject property hierarchy

Object Properties ↑

class partition
Data Dump
example resource of dataset
feature
in dataset
a link predicate
open search description
property partition
root resource
has a SPARQL endpoint at
has subset
Target
has an URI look-up endpoint at
vocabulary

class partition^op

URI	`http://rdfs.org/ns/void#classPartition`
Description	A subset of a void:Dataset that contains only the entities of a certain rdfs:Class.
Super-properties	void:subset^op
Domain(s)	void:Dataset^c
Range(s)	void:Dataset^c

Data Dump^op

URI	`http://rdfs.org/ns/void#dataDump`
Description	An RDF dump, partial or complete, of a void:Dataset.
Domain(s)	void:Dataset^c
Range(s)	rdfs:Resource^c

example resource of dataset^op

URI	`http://rdfs.org/ns/void#exampleResource`
Domain(s)	void:Dataset^c
Range(s)	rdfs:Resource^c

feature^op

URI	`http://rdfs.org/ns/void#feature`
Domain(s)	void:Dataset^c
Range(s)	void:TechnicalFeature^c

in dataset^op

URI	`http://rdfs.org/ns/void#inDataset`
Description	Points to the void:Dataset that a document is a part of.
Domain(s)	foaf:Document^c
Range(s)	void:Dataset^c

a link predicate^op

URI	`http://rdfs.org/ns/void#linkPredicate`
Domain(s)	void:Linkset^c
Range(s)	rdf:Property^c

open search description^op

URI	`http://rdfs.org/ns/void#openSearchDescription`
Description	An OpenSearch description document for a free-text search service over a void:Dataset.
Domain(s)	void:Dataset^c
Range(s)	foaf:Document^c

property partition^op

URI	`http://rdfs.org/ns/void#propertyPartition`
Description	A subset of a void:Dataset that contains only the triples of a certain rdf:Property.
Super-properties	void:subset^op
Domain(s)	void:Dataset^c
Range(s)	void:Dataset^c

root resource^op

URI	`http://rdfs.org/ns/void#rootResource`
Description	A top concept or entry point for a void:Dataset that is structured in a tree-like fashion. All resources in a dataset can be reached by following links from its root resources in a small number of steps.
Domain(s)	void:Dataset^c

has a SPARQL endpoint at^op

URI	`http://rdfs.org/ns/void#sparqlEndpoint`
Domain(s)	void:Dataset^c

has subset^op

URI	`http://rdfs.org/ns/void#subset`
Domain(s)	void:Dataset^c
Range(s)	void:Dataset^c

Target^op

URI	`http://rdfs.org/ns/void#target`
Description	One of the two datasets linked by the Linkset.
Domain(s)	void:Linkset^c
Range(s)	void:Dataset^c

has an URI look-up endpoint at^op

URI	`http://rdfs.org/ns/void#uriLookupEndpoint`
Description	Defines a simple URI look-up protocol for accessing a dataset.
Domain(s)	void:Dataset^c

vocabulary^op

URI	`http://rdfs.org/ns/void#vocabulary`
Description	A vocabulary that is used in the dataset.
Domain(s)	void:Dataset^c

Functional Properties ↑

class
Objects Target
property
Subjects Target

class^fp

URI	`http://rdfs.org/ns/void#class`
Description	The rdfs:Class that is the rdf:type of all entities in a class-based partition.
Domain(s)	void:Dataset^c
Range(s)	rdfs:Class^c

Objects Target^fp

URI	`http://rdfs.org/ns/void#objectsTarget`
Description	The dataset describing the objects of the triples contained in the Linkset.
Super-properties	void:target^op
Domain(s)	void:Linkset^c
Range(s)	void:Dataset^c

property^fp

URI	`http://rdfs.org/ns/void#property`
Description	The rdf:Property that is the predicate of all triples in a property-based partition.
Domain(s)	void:Dataset^c
Range(s)	rdf:Property^c

Subjects Target^fp

URI	`http://rdfs.org/ns/void#subjectsTarget`
Description	The dataset describing the subjects of triples contained in the Linkset.
Super-properties	void:target^op
Domain(s)	void:Linkset^c
Range(s)	void:Dataset^c

Datatype Properties ↑

classes
distinct objects
distinct subjects
number of documents
number of entities
number of properties
number of triples
URI space

classes^dp

URI	`http://rdfs.org/ns/void#classes`
Description	The total number of distinct classes in a void:Dataset. In other words, the number of distinct resources occuring as objects of rdf:type triples in the dataset.
Domain(s)	void:Dataset^c
Range(s)	xsd:integer^c

distinct objects^dp

URI	`http://rdfs.org/ns/void#distinctObjects`
Description	The total number of distinct objects in a void:Dataset. In other words, the number of distinct resources that occur in the object position of triples in the dataset. Literals are included in this count.
Domain(s)	void:Dataset^c
Range(s)	xsd:integer^c

distinct subjects^dp

URI	`http://rdfs.org/ns/void#distinctSubjects`
Description	The total number of distinct subjects in a void:Dataset. In other words, the number of distinct resources that occur in the subject position of triples in the dataset.
Domain(s)	void:Dataset^c
Range(s)	xsd:integer^c

number of documents^dp

URI	`http://rdfs.org/ns/void#documents`
Description	The total number of documents, for datasets that are published as a set of individual documents, such as RDF/XML documents or RDFa-annotated web pages. Non-RDF documents, such as web pages in HTML or images, are usually not included in this count. This property is intended for datasets where the total number of triples or entities is hard to determine. void:triples or void:entities should be preferred where practical.
Domain(s)	void:Dataset^c
Range(s)	xsd:integer^c

number of entities^dp

URI	`http://rdfs.org/ns/void#entities`
Description	The total number of entities that are described in a void:Dataset.
Domain(s)	void:Dataset^c
Range(s)	xsd:integer^c

number of properties^dp

URI	`http://rdfs.org/ns/void#properties`
Description	The total number of distinct properties in a void:Dataset. In other words, the number of distinct resources that occur in the predicate position of triples in the dataset.
Domain(s)	void:Dataset^c
Range(s)	xsd:integer^c

number of triples^dp

URI	`http://rdfs.org/ns/void#triples`
Description	The total number of triples contained in a void:Dataset.
Domain(s)	void:Dataset^c
Range(s)	xsd:integer^c

URI space^dp

URI	`http://rdfs.org/ns/void#uriSpace`
Description	A URI that is a common string prefix of all the entity URIs in a void:Dataset.
Domain(s)	void:Dataset^c
Range(s)	rdfs:Literal^c

Namespaces ↑

adms: http://www.w3.org/ns/adms#
dc: http://purl.org/dc/elements/1.1/
dct: http://purl.org/dc/terms/
foaf: http://xmlns.com/foaf/0.1/
owl: http://www.w3.org/2002/07/owl#
prov: http://www.w3.org/ns/prov#
rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs: http://www.w3.org/2000/01/rdf-schema#
sdo: https://schema.org/
skos: http://www.w3.org/2004/02/skos/core#
vann: http://purl.org/vocab/vann/
void: http://rdfs.org/ns/void#
xsd: http://www.w3.org/2001/XMLSchema#

^c	Classes
^op	Object Properties
^fp	Functional Properties
^dp	Data Properties
^dp	Annotation Properties
^p	Properties
ⁿⁱ	Named Individuals

Vocabulary of Interlinked Datasets (VoID)

Metadata

Description

Table of Contents

Classes ↑

datasetc

dataset descriptionc

linksetc

technical featurec

Object Properties ↑

class partitionop

Data Dumpop

example resource of datasetop

featureop

in datasetop

a link predicateop

open search descriptionop

property partitionop

root resourceop

has a SPARQL endpoint atop

has subsetop

Targetop

has an URI look-up endpoint atop

vocabularyop