@comunica/actor-query-operation-leftjoin-left-deep

Comunica LeftJoin left-deep Query Operation Actor

A Query Operation actor that handles SPARQL OPTIONAL operations in a left-deep manner.

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

$ yarn add @comunica/actor-query-operation-leftjoin-left-deep

Configure

After installing, this package can be added to your engine's configuration as follows:

{
  "@context": [
    ...
    "https://linkedsoftwaredependencies.org/bundles/npm/@comunica/actor-query-operation-leftjoin-left-deep/^1.0.0/components/context.jsonld"  
  ],
  "actors": [
    ...
    {
      "@id": "config-sets:sparql-queryoperators.json#myLeftJoinQueryOperator",
      "@type": "ActorQueryOperationLeftJoinLeftDeep",
      "cbqo:mediatorQueryOperation": { "@id": "config-sets:sparql-queryoperators.json#mediatorQueryOperation" }
    }
  ]
}

Config Parameters

• cbqo:mediatorQueryOperation: A mediator over the Query Operation bus.