OWL 2 QL

E31305

OWL 2 profile ontology language profile

OWL 2 QL is a lightweight profile of the Web Ontology Language designed to enable efficient query answering over large datasets using standard relational database technologies.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (4)

Label	Occurrences
OWL 2 QL canonical	5
DL-Lite family	1
OWL 2	1
OWL 2 Web Ontology Language Profiles specification	1

How this entity was disambiguated

This entity first appeared as the object of triple T230890 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: OWL 2 QL
Context triple: [OWL, hasProfile, OWL 2 QL]

A. OWL Full
OWL Full is the most expressive and semantically unrestricted variant of the Web Ontology Language, allowing full RDF compatibility at the cost of computational decidability.
B. OWL
OWL (Web Ontology Language) is a W3C-recommended semantic web language used to define and share rich, machine-interpretable ontologies on the web.
C. SPARQL
SPARQL is a semantic query language and protocol used to retrieve and manipulate data stored in Resource Description Framework (RDF) format on the Semantic Web.
D. RDFS
RDFS (RDF Schema) is a semantic web vocabulary language used to define the structure, classes, and properties of RDF data.
E. Semantic Web
The Semantic Web is an extension of the current web in which information is given well-defined meaning through standards like RDF and OWL, enabling machines to understand, share, and reason about data across different systems.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: OWL 2 QL
Target entity description: OWL 2 QL is a lightweight profile of the Web Ontology Language designed to enable efficient query answering over large datasets using standard relational database technologies.

A. OWL Full
OWL Full is the most expressive and semantically unrestricted variant of the Web Ontology Language, allowing full RDF compatibility at the cost of computational decidability.
B. OWL
OWL (Web Ontology Language) is a W3C-recommended semantic web language used to define and share rich, machine-interpretable ontologies on the web.
C. SPARQL
SPARQL is a semantic query language and protocol used to retrieve and manipulate data stored in Resource Description Framework (RDF) format on the Semantic Web.
D. RDFS
RDFS (RDF Schema) is a semantic web vocabulary language used to define the structure, classes, and properties of RDF data.
E. Semantic Web
The Semantic Web is an extension of the current web in which information is given well-defined meaning through standards like RDF and OWL, enabling machines to understand, share, and reason about data across different systems.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	OWL 2 profile ⓘ ontology language profile ⓘ
allows	concept inclusions of limited form ⓘ role inclusions with certain restrictions ⓘ
basedOn	DL-Lite family of description logics ⓘ
compatibleWith	standard relational database technologies ⓘ
contrastedWith	OWL DL ⓘ surface form: OWL 2 DL OWL 2 EL ⓘ OWL 2 RL ⓘ
designedFor	efficient query answering ⓘ large datasets ⓘ use with relational database systems ⓘ
disallows	arbitrary role composition ⓘ complex cardinality restrictions ⓘ full negation on complex concepts ⓘ
enables	rewriting ontology-mediated queries into SQL ⓘ
hasAbbreviation	QL ⓘ
hasComplexity	AC0 data complexity for certain query answering tasks ⓘ
hasConstraint	no complex role inclusion cycles ⓘ no role transitivity axioms ⓘ
hasDesignGoal	scalability to very large data volumes ⓘ tractable reasoning over large ABoxes ⓘ
hasDesignTradeoff	limited support for complex class constructors ⓘ restricted expressivity in the TBox ⓘ
hasProfileType	lightweight profile ⓘ
hasProperty	first-order rewritability of queries ⓘ
hasReasoningTask	classification of lightweight ontologies ⓘ query answering ⓘ
hasSemantics	model-theoretic semantics of OWL 2 ⓘ
implementedIn	OBDA systems ⓘ various ontology reasoners ⓘ
introducedIn	OWL 2 recommendation ⓘ
nameMeaning	Query Language ⓘ
optimizedFor	conjunctive query answering ⓘ
partOf	OWL 2 QL self-linksurface differs ⓘ surface form: OWL 2
relatedTo	RDF ⓘ SPARQL ⓘ ontology-based data management ⓘ
specifiedIn	OWL 2 QL self-linksurface differs ⓘ surface form: OWL 2 Web Ontology Language Profiles specification
standardizedBy	World Wide Web Consortium ⓘ surface form: W3C
subClassOf	Description Logic ⓘ
supports	polynomial-time query answering in data complexity ⓘ
targetEnvironment	database-backed applications ⓘ enterprise information systems ⓘ
useCase	data integration over relational sources ⓘ ontology-based data access ⓘ semantic querying of legacy databases ⓘ
usedWith	mapping languages for relational-to-ontology mappings ⓘ

How these facts were elicited

Referenced by (8)

Full triples — surface form annotated when it differs from this entity's canonical label.

OWL → hasProfile → OWL 2 QL ⓘ

OWL Full → contrastsWith → OWL 2 QL ⓘ

OWL 2 QL → partOf → OWL 2 QL self-linksurface differs ⓘ

this entity surface form: OWL 2

OWL 2 QL → specifiedIn → OWL 2 QL self-linksurface differs ⓘ

this entity surface form: OWL 2 Web Ontology Language Profiles specification

Description Logic → hasSubfamily → OWL 2 QL ⓘ

this entity surface form: DL-Lite family

OWL 2 recommendation → defines → OWL 2 QL ⓘ

OWL 2 RL → contrastedWith → OWL 2 QL ⓘ

OWL 2 EL → contrastedWith → OWL 2 QL ⓘ

All labels observed (4)

How this entity was disambiguated Show

Statements (48)

How these facts were elicited Show

Referenced by (8)

How this entity was disambiguated

How these facts were elicited