Comunica Minus Hash Undef RDF Join Actor

An RDF Join actor that anti-joins (minus) 2 streams using the hash join algorithm. This actor supports streams that can have undefined values.

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-rdf-join-minus-hash-undef

Configure

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

{
  "@context": [
    ...
    "https://linkedsoftwaredependencies.org/bundles/npm/@comunica/actor-rdf-join-minus-hash-undef/^3.0.0/components/context.jsonld"
  ],
  "actors": [
    ...
    {
      "@id": "urn:comunica:default:rdf-join/actors#minus-hash-undef",
      "@type": "ActorRdfJoinMinusHashUndef",
      "mediatorJoinSelectivity": { "@id": "urn:comunica:default:rdf-join-selectivity/mediators#main" }
    }
  ]
}

Config Parameters

• mediatorJoinSelectivity: A mediator over the RDF Join Selectivity bus.