@comunica/actor-query-operation-service
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A service query-operation actor
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# Comunica Service Query Operation Actor
[](https://www.npmjs.com/package/@comunica/actor-query-operation-service)
A [Query Operation](https://github.com/comunica/comunica/tree/master/packages/bus-query-operation) actor that handles [SPARQL `ASK`](https://www.w3.org/TR/sparql11-query/#ask) operations
by setting the given service target as source in the context.
This module is part of the [Comunica framework](https://github.com/comunica/comunica),
and should only be used by [developers that want to build their own query engine](https://comunica.dev/docs/modify/).
[Click here if you just want to query with Comunica](https://comunica.dev/docs/query/).
## Install
```bash
$ yarn add /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" }
}
]
}
```
### Config Parameters
* `mediatorQueryOperation`: A mediator over the [Query Operation bus](https://github.com/comunica/comunica/tree/master/packages/bus-query-operation).
* `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](https://github.com/comunica/comunica/tree/master/packages/bus-merge-bindings-context).