Comunica Service Query Operation Actor


A Query Operation actor that handles SPARQL ASK operations
by setting the given service target as source in the context.

This module is part of the Comunica framework,
and should only be used by developers that want to build their own query engine.

Click here if you just want to query with Comunica.

Install

``bash
$ yarn add @comunica/actor-query-operation-service
`

Configure

After installing, this package can be added to your engine's configuration as follows:
`text
{
"@context": [
...
"https://linkedsoftwaredependencies.org/bundles/npm/@comunica/actor-query-operation-service/^4.0.0/components/context.jsonld"
],
"actors": [
...
{
"@id": "urn:comunica:default:query-operation/actors#service",
"@type": "ActorQueryOperationService",
"mediatorQueryOperation": { "@id": "urn:comunica:default:query-operation/mediators#main" },
"forceSparqlEndpoint": false,
"mediatorMergeBindingsContext": { "@id": "urn:comunica:default:merge-bindings-context/mediators#main" }
}
]
}
`

$3

* cacheSize: The number of service clause targets to cache, to avoid repetitive source identification. Defaults to 32.
* httpInvalidator: A mediator over the HTTP invalidate bus.
* mediatorQueryOperation: A mediator over the Query Operation bus.
* forceSparqlEndpoint: Optional flag indicating if the SERVICE target should be assumed to be a SPARQL endpoint, defaults to false.
* mediatorMergeBindingsContext`: A mediator over the Merge Bindings Context bus.