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OpenAPI Specification
openapi: 3.2.0
info:
title: SPARQL 1.1 Protocol Query API
description: 'SPARQL 1.1 Protocol is a W3C Recommendation that defines how to convey
SPARQL queries and updates between clients and SPARQL processors over
HTTP.'
version: '1.1'
contact:
name: W3C SPARQL Working Group
url: https://www.w3.org/TR/sparql11-protocol/
license:
name: W3C Document License
url: https://www.w3.org/Consortium/Legal/2015/doc-license
servers:
- url: https://dbpedia.org
description: Public DBpedia SPARQL endpoint (no auth)
- url: https://{host}
description: Generic SPARQL 1.1 endpoint
variables:
host:
default: example.org
description: Hostname of a SPARQL 1.1 endpoint
tags:
- name: Query
description: SPARQL query operation
paths:
/sparql:
get:
tags:
- Query
summary: Execute a SPARQL query via GET
description: 'Executes a SPARQL query passed as the `query` URL parameter. The
query string MUST be percent-encoded. Optional `default-graph-uri`
and `named-graph-uri` parameters may be repeated to specify the
RDF dataset against which the query is evaluated.'
operationId: queryGet
parameters:
- name: query
in: query
required: true
description: A SPARQL query string, percent-encoded
schema:
type: string
example: SELECT * WHERE { ?s ?p ?o } LIMIT 10
- name: default-graph-uri
in: query
required: false
description: IRI of a graph to include in the default graph (repeatable)
schema:
type: array
items:
type: string
format: uri
style: form
explode: true
- name: named-graph-uri
in: query
required: false
description: IRI of a graph to include as a named graph (repeatable)
schema:
type: array
items:
type: string
format: uri
style: form
explode: true
- name: Accept
in: header
required: false
description: Preferred response media type
schema:
type: string
enum:
- application/sparql-results+json
- application/sparql-results+xml
- application/sparql-results+csv
- application/sparql-results+tsv
- application/rdf+xml
- text/turtle
responses:
'200':
description: Successful query result
content:
application/sparql-results+json:
schema:
$ref: '#/components/schemas/SparqlResultsJson'
application/sparql-results+xml:
schema:
type: string
application/sparql-results+csv:
schema:
type: string
application/sparql-results+tsv:
schema:
type: string
application/rdf+xml:
schema:
type: string
text/turtle:
schema:
type: string
'400':
description: Malformed query
'500':
description: Query request refused
post:
tags:
- Query
summary: Execute a SPARQL query via POST
description: 'Executes a SPARQL query via POST. Two encodings are defined by the
SPARQL 1.1 Protocol:
* `application/x-www-form-urlencoded` — the body carries the same
parameters as the GET variant (`query`, `default-graph-uri`,
`named-graph-uri`).
* `application/sparql-query` — the body IS the SPARQL query string,
in UTF-8, and `default-graph-uri` / `named-graph-uri` may still
appear in the URL query string.'
operationId: queryPost
parameters:
- name: default-graph-uri
in: query
required: false
schema:
type: array
items:
type: string
format: uri
style: form
explode: true
- name: named-graph-uri
in: query
required: false
schema:
type: array
items:
type: string
format: uri
style: form
explode: true
requestBody:
required: true
content:
application/x-www-form-urlencoded:
schema:
type: object
required:
- query
properties:
query:
type: string
description: SPARQL query string
default-graph-uri:
type: array
items:
type: string
format: uri
named-graph-uri:
type: array
items:
type: string
format: uri
application/sparql-query:
schema:
type: string
description: SPARQL query string (UTF-8)
example: SELECT * WHERE { ?s ?p ?o } LIMIT 10
responses:
'200':
description: Successful query result
content:
application/sparql-results+json:
schema:
$ref: '#/components/schemas/SparqlResultsJson'
application/sparql-results+xml:
schema:
type: string
'400':
description: Malformed query
components:
schemas:
SparqlResultsJson:
type: object
description: 'SPARQL Query Results JSON Format, per
https://www.w3.org/TR/sparql11-results-json/
'
required:
- head
properties:
head:
type: object
properties:
vars:
type: array
items:
type: string
link:
type: array
items:
type: string
format: uri
results:
type: object
properties:
bindings:
type: array
items:
type: object
additionalProperties:
$ref: '#/components/schemas/RdfTerm'
boolean:
type: boolean
description: Present for ASK queries
RdfTerm:
type: object
required:
- type
- value
properties:
type:
type: string
enum:
- uri
- literal
- bnode
value:
type: string
datatype:
type: string
format: uri
xml:lang:
type: string