Info

Download the ontology in RDF: Turtle, N-Triples, JSON-LD, RDF/XML.

Info

You can also download other versions of the ontology or an OWL 2 DL version. See the versioning and releases section below for more information.

Note

The documentation and the download links here are for the release version of the ontology. The ontology sources are available on GitHub – see also Contributing.

made by pyLODE 2.13.2

RDF Stream Taxonomy

Metadata

URI

https://w3id.org/stax/ontology

Publisher(s)

0000-0002-2543-9461

Creator(s)

Piotr Sowiński

Contributor(s)

Paweł Szmeja

Created

2023-10-22T00:00:00

Modified

2023-11-27T10:44:01

Issued

2023-10-23T00:00:00

Version Information

1.0.0

Version URI

https://w3id.org/stax/1.0.0/ontology

Imports

http://www.w3.org/TR/skos-reference/skos-owl1-dl.rdf

License

https://spdx.org/licenses/CC-BY-4.0

Source

https://github.com/RDF-STaX/rdf-stax.github.io/tree/v1.0.0

Description

RDF-STaX is an OWL 2 DL ontology that enables describing the types of RDF streams and defines relations between them.

Table of Contents

1. Classes
2. Object Properties
3. Annotation Properties
4. Named Individuals
5. Namespaces
6. Legend

Overview

Figure 1: Ontology overview

Classes ↑

• Abstract RDF stream type
• Concrete RDF stream type
• RDF element type
• RDF stream type
• RDF stream type usage

Abstract RDF stream type^c # Classes

URI	https://w3id.org/stax/ontology#AbstractRdfStreamType
Description	Class for abstract RDF stream types in the taxonomy. Instances of this class have abstract definitions, i.e., they cannot be used to annotate real streams. They are only intended to be used for reasoning about stream types.
Super-classes	RDF stream typec
Members	stax:flatStream stax:rdfStream stax:groupedStream

Concrete RDF stream type^c # Classes

URI	https://w3id.org/stax/ontology#ConcreteRdfStreamType
Description	Class for the concrete RDF stream types in the taxonomy. Instances of this class have concrete definitions, and they can be used to annotate real streams.
Super-classes	RDF stream typec
Restrictions	has element typeop some RDF element typec has element typeop only RDF element typec
In domain of	can be grouped intoop can be flattened intoop has element typeop is in stream type semantic relation withop can be trivially extended intoop
In range of	has stream typeop can be grouped intoop can be flattened intoop can be trivially extended intoop is in stream type semantic relation withop
Members	stax:graphStream stax:flatTripleStream stax:datasetStream stax:timestampedNamedGraphStream stax:subjectGraphStream stax:namedGraphStream stax:flatQuadStream

RDF element type^c # Classes

URI	https://w3id.org/stax/ontology#RdfElementType
Description	Class for base types of elements in RDF streams. There are four instances of this class (triple, quad, graph, dataset) and they should not be further specialized. The instances of this class do NOT form a taxonomical structure.
In range of	has element typeop
Members	stax:triple stax:graph stax:dataset stax:quad

RDF stream type^c # Classes

URI	https://w3id.org/stax/ontology#RdfStreamType
Description	Base class for RDF stream types. This class should not be used directly – use instead either stax:AbstractRdfStreamType or stax:ConcreteRdfStreamType.
Super-classes	skos:Conceptc
Sub-classes	Concrete RDF stream typec Abstract RDF stream typec

RDF stream type usage^c # Classes

URI	https://w3id.org/stax/ontology#RdfStreamTypeUsage
Description	Class for instances of using an RDF stream type, in a program, an academic paper, or elsewhere. This class is suitable for annotating both theoretical uses and practical ones, i.e., real streams or datasets. Instances of this class should have the stax:hasStreamType property pointing to a concrete stream type. The stax:usedIn property is recommended to indicate where the stream is used – alternatively you can use its inverse (stax:hasStreamTypeUsage). The use of other properties (e.g., rdfs:label, rdfs:comment) is encouraged to give more context about the usage. Note that "stream type usage" is a subjective assertion and instances of this class may be annotated with additional provenance properties to explain who made the assertion. There can be multiple views on what type of stream is in use, depending on the involved actor, processing step, etc.
Example(s)	https://w3id.org/stax/dev/use-it/
Restrictions	has stream typeop only Concrete RDF stream typec
In domain of	is usage ofop has stream typeop
In range of	has stream type usageop

Object Properties ↑

• can be flattened into
• can be grouped into
• can be trivially extended into
• has element type
• has stream type
• has stream type usage
• is usage of
• is in stream type semantic relation with

can be flattened into^op # OPs

URI	https://w3id.org/stax/ontology#canBeFlattenedInto
Description	Indicates that the subject stream type can be flattened into the object. The flattening is done by enumerating all components of the stream elements in one, flat stream. For example, a graph stream can be flattened into a flat triple stream.
Super-properties	is in stream type semantic relation withop
Domain(s)	Concrete RDF stream typec
Range(s)	stax:ConcreteRdfStreamTypec

can be grouped into^op # OPs

URI	https://w3id.org/stax/ontology#canBeGroupedInto
Description	Indicates that the subject stream type can be grouped into the object. The grouping is done by splitting the flat stream of statements into groups, which then can be used to construct elements of the grouped stream. For example, a flat triple stream can be grouped into a graph stream. In this operation, the ordering information within a group is lost.
Super-properties	is in stream type semantic relation withop
Domain(s)	Concrete RDF stream typec
Range(s)	stax:ConcreteRdfStreamTypec

can be trivially extended into^op # OPs

URI	https://w3id.org/stax/ontology#canBeTriviallyExtendedInto
Description	Indicates that the subject stream type that uses triples or graphs can be trivially extended into the object type that uses quads or datasets. The extension is done by (in case of flat RDF streams) adding a fourth component, corresponding to the default graph. In case of grouped RDF streams, the contents of the graph are placed explicitly in the default graph.
Super-properties	is in stream type semantic relation withop
Domain(s)	Concrete RDF stream typec
Range(s)	stax:ConcreteRdfStreamTypec

has element type^op # OPs

URI	https://w3id.org/stax/ontology#hasElementType
Description	For an RDF stream type, indicates the base (primitive) type of elements in the stream (e.g., triple, quad, graph, dataset).
Domain(s)	Concrete RDF stream typec
Range(s)	stax:RdfElementTypec

has stream type^op # OPs

URI	https://w3id.org/stax/ontology#hasStreamType
Description	For an RDF stream type usage, this property indicates which stream type is used.
Domain(s)	RDF stream type usagec
Range(s)	stax:ConcreteRdfStreamTypec

has stream type usage^op # OPs

URI	https://w3id.org/stax/ontology#hasStreamTypeUsage
Description	Inverse of stax:isUsageOf – indicates that the subject is related to a usage of an RDF stream type. The subject for this property can be for example a published stream on the Web (e.g., vocals:RDFStream) or a scientific publication that discusses a usage of an RDF stream type.
Inverse properties	is usage ofop
Range(s)	stax:RdfStreamTypeUsagec

is usage of^op # OPs

URI	https://w3id.org/stax/ontology#isUsageOf
Description	For an RDF stream type usage, this property indicates where the stream was used or from where the usage was derived. The value of this property can be anything that makes sense for the desired use case. The value can be for example: the DOI URL of an academic work, URL of a piece of software, IRI of a published stream, IRI of an RDF dataset. Inverse of stax:hasStreamTypeUsage.
Domain(s)	RDF stream type usagec

is in stream type semantic relation with^op # OPs

URI	https://w3id.org/stax/ontology#streamTypeSemanticRelation
Description	This property should not be used directly, but as a super-property for all properties denoting a relationship of meaning between RDF stream types.
Super-properties	skos:semanticRelation
Domain(s)	Concrete RDF stream typec
Range(s)	stax:ConcreteRdfStreamTypec

Annotation Properties ↑

• description
• title
• created
• issued
• license
• modified
• publisher
• source
• status
• preferredNamespacePrefix
• preferredNamespaceUri
• citation
• homepage
• logo

description^ap # APs

URI	http://purl.org/dc/elements/1.1/description

title^ap # APs

URI	http://purl.org/dc/elements/1.1/title

created^ap # APs

URI	http://purl.org/dc/terms/created

issued^ap # APs

URI	http://purl.org/dc/terms/issued

license^ap # APs

URI	http://purl.org/dc/terms/license

modified^ap # APs

URI	http://purl.org/dc/terms/modified

publisher^ap # APs

URI	http://purl.org/dc/terms/publisher

source^ap # APs

URI	http://purl.org/dc/terms/source

status^ap # APs

URI	http://purl.org/ontology/bibo/status

preferredNamespacePrefix^ap # APs

URI	http://purl.org/vocab/vann/preferredNamespacePrefix

preferredNamespaceUri^ap # APs

URI	http://purl.org/vocab/vann/preferredNamespaceUri

citation^ap # APs

URI	http://schema.org/citation

homepage^ap # APs

URI	http://xmlns.com/foaf/0.1/homepage

logo^ap # APs

URI	http://xmlns.com/foaf/0.1/logo

Named Individuals ↑

• Flat RDF quad stream
• Flat RDF stream
• Flat RDF triple stream
• Grouped RDF stream
• RDF Stream Taxonomy
• RDF dataset
• RDF dataset stream
• RDF graph
• RDF graph stream
• RDF named graph stream
• RDF quad
• RDF stream
• RDF subject graph stream
• RDF triple
• Timestamped RDF named graph stream

RDF Stream Taxonomyⁿⁱ

Class(es)

skos:ConceptScheme
owl:Ontology

URI	https://w3id.org/stax/ontology
Source	https://github.com/RDF-STaX/rdf-stax.github.io/tree/v1.0.0
Description	RDF-STaX is an OWL 2 DL ontology that enables describing the types of RDF streams and defines relations between them.

RDF datasetⁿⁱ

Class(es)

stax:RdfElementType

URI	https://w3id.org/stax/ontology#dataset
Description	https://www.w3.org/TR/rdf11-concepts/#section-dataset

RDF dataset streamⁿⁱ

Class(es)

skos:Concept
stax:ConcreteRdfStreamType

URI	https://w3id.org/stax/ontology#datasetStream
Description	An RDF dataset stream is a grouped RDF stream whose elements are RDF datasets.

Flat RDF quad streamⁿⁱ

Class(es)

skos:Concept
stax:ConcreteRdfStreamType

URI	https://w3id.org/stax/ontology#flatQuadStream
Description	A flat RDF quad stream is a flat RDF stream whose elements are quads.

Flat RDF streamⁿⁱ

Class(es)

stax:AbstractRdfStreamType
skos:Concept

URI	https://w3id.org/stax/ontology#flatStream
Description	A flat RDF stream is an RDF stream whose elements are statements (either RDF triples or RDF quads).

Flat RDF triple streamⁿⁱ

Class(es)

skos:Concept
stax:ConcreteRdfStreamType

URI	https://w3id.org/stax/ontology#flatTripleStream
Description	A flat RDF triple stream is a flat RDF stream whose elements are triples.

RDF graphⁿⁱ

Class(es)

stax:RdfElementType

URI	https://w3id.org/stax/ontology#graph
Description	https://www.w3.org/TR/rdf11-concepts/#section-rdf-graph

RDF graph streamⁿⁱ

Class(es)

skos:Concept
stax:ConcreteRdfStreamType

URI	https://w3id.org/stax/ontology#graphStream
Description	An RDF graph stream is a grouped RDF stream whose elements are unnamed (default) RDF graphs.

Grouped RDF streamⁿⁱ

Class(es)

stax:AbstractRdfStreamType
skos:Concept

URI	https://w3id.org/stax/ontology#groupedStream
Description	A grouped RDF stream is an RDF stream whose elements are either RDF graphs or RDF datasets.

RDF named graph streamⁿⁱ

Class(es)

skos:Concept
stax:ConcreteRdfStreamType

URI	https://w3id.org/stax/ontology#namedGraphStream
Description	An RDF named graph stream is an RDF dataset stream in which every element has exactly one named RDF graph pair , where G is an RDF graph, and n is the graph name. Apart from graph G, the dataset may contain any number of triples in the default graph.

RDF quadⁿⁱ

Class(es)

stax:RdfElementType

URI	https://w3id.org/stax/ontology#quad
Description	https://www.w3.org/TR/2023/WD-rdf12-concepts-20231013/#section-dataset-quad

RDF streamⁿⁱ

Class(es)

stax:AbstractRdfStreamType
skos:Concept

URI	https://w3id.org/stax/ontology#rdfStream
Description	An RDF stream is an ordered, potentially infinite sequence of RDF stream elements.

RDF subject graph streamⁿⁱ

Class(es)

skos:Concept
stax:ConcreteRdfStreamType

URI	https://w3id.org/stax/ontology#subjectGraphStream
Description	An RDF subject graph stream is an RDF graph stream in which every element contains an IRI node (called the subject node) that uniquely identifies the graph in the stream. Every other node in the graph can be reached by traversing triples, starting from the subject node.

Timestamped RDF named graph streamⁿⁱ

Class(es)

skos:Concept
stax:ConcreteRdfStreamType

URI

https://w3id.org/stax/ontology#timestampedNamedGraphStream

Description

A timestamped named graph is an RDF dataset in which: (1) there is exactly one named RDF graph pair , where G is an RDF graph, and n is the graph name; (2) the default graph includes a timestamp triple , where p is a timestamp predicate that relates t, called the timestamp, and the graph G. A timestamped RDF named graph stream is an RDF named graph stream in which every element is a timestamped named graph. The elements that share the same timestamp predicate p are ordered by the partial order associated with p.

RDF tripleⁿⁱ

Class(es)

stax:RdfElementType

URI	https://w3id.org/stax/ontology#triple
Description	https://www.w3.org/TR/rdf11-concepts/#section-triples

Namespaces ↑

default (stax)

https://w3id.org/stax/ontology#

brick

https://brickschema.org/schema/Brick#

csvw

http://www.w3.org/ns/csvw#

dc

http://purl.org/dc/elements/1.1/

dcam

http://purl.org/dc/dcam/

dcat

http://www.w3.org/ns/dcat#

dcmitype

http://purl.org/dc/dcmitype/

dcterms

http://purl.org/dc/terms/

doap

http://usefulinc.com/ns/doap#

foaf

http://xmlns.com/foaf/0.1/

geo

http://www.opengis.net/ont/geosparql#

ns1

http://purl.org/ontology/bibo/

odrl

http://www.w3.org/ns/odrl/2/

org

http://www.w3.org/ns/org#

owl

http://www.w3.org/2002/07/owl#

prof

http://www.w3.org/ns/dx/prof/

prov

http://www.w3.org/ns/prov#

qb

http://purl.org/linked-data/cube#

rdf

http://www.w3.org/1999/02/22-rdf-syntax-ns#

rdfs

http://www.w3.org/2000/01/rdf-schema#

schema1

http://schema.org/

sd

http://www.w3.org/ns/sparql-service-description#

sdo

https://schema.org/

sh

http://www.w3.org/ns/shacl#

skos

http://www.w3.org/2004/02/skos/core#

sosa

http://www.w3.org/ns/sosa/

ssn

http://www.w3.org/ns/ssn/

time

http://www.w3.org/2006/time#

vann

http://purl.org/vocab/vann/

void

http://rdfs.org/ns/void#

wgs

https://www.w3.org/2003/01/geo/wgs84_pos#

xsd

http://www.w3.org/2001/XMLSchema#

Legend

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

OWL 2 Profiles

The ontology is written in OWL 2 DL. It is checked for compliance with the profile in the CI pipeline.

RDF-STaX imports SKOS, which is OWL 2 Full by default. There is however a subset of SKOS that is OWL 2 DL, and this is the version of SKOS that is used in RDF-STaX.

The released version of the ontology includes additional assertions (inferred, authorship, alignments) that are not part of the ontology itself. These assertions may be in OWL 2 Full. To get the OWL 2 DL version of the ontology, see the notes on versioning and releases below.

Versioning and releases

RDF-STaX follows the Semantic Versioning 2 scheme. The version number is stored in the owl:versionInfo annotation property of the ontology and is a part of the version IRI. The dev version corresponds to the main branch of the repository. When you don't specify a version, the dev version is used.

The dropdown at the top of the page allows you to switch between different versions of the documentation. Previous releases can also be found on GitHub.

The released versions of the ontology include also the inferred statements, authorship information, and alignments to other ontologies. If you would like to get the raw ontology without these additions (OWL 2 DL), append /dl to the URL, e.g., https://w3id.org/stax/ontology/dl.

Released versions of the ontology are available in the JSON-LD, N-Triples, RDF/XML, and Turtle formats, by appending their respective extension at the end of the ontology's URL, or with the content negotiation mechanism. Some examples of links that would work:

• https://w3id.org/stax/ontology (content negotiation)
• https://w3id.org/stax/ontology.rdf (explicitly ask for RDF/XML)
• https://w3id.org/stax/ontology/dl.rdf (OWL 2 DL version, explicitly ask for RDF/XML)
• https://w3id.org/stax/dev/ontology (content negotiation)
• https://w3id.org/stax/dev/ontology/dl (OWL 2 DL version, content negotiation)
• https://w3id.org/stax/dev/ontology.ttl (explicitly ask for Turtle)
• https://w3id.org/stax/1.0.0/ontology (content negotiation)
• https://w3id.org/stax/1.0.0/ontology.jsonld (explicitly ask for JSON-LD)

Important

The RDF of the ontology can only be accessed via the ontology's PURL (https://w3id.org/stax/...), not via the URL you currently see in your browser.

Note

The process for making releases is described on the Contributing page.

Archival in Zenodo

Each RDF-STaX release is archived in Zenodo under this DOI: 10.5281/zenodo.10072907.

See also

• How to use it?
• Taxonomy overview
• Contributing