# Comunica Zero-knowledge-based Traversal RDF Join Entries Sort Actor

[![npm version](https://badge.fury.io/js/%40comunica%2Factor-rdf-join-entries-sort-traversal-zero-knowledge.svg)](https://www.npmjs.com/package/@comunica/actor-rdf-join-entries-sort-traversal-zero-knowledge)

An [RDF Join Entries Sort](https://github.com/comunica/comunica/tree/master/packages/bus-rdf-join-entries-sort) actor
that orders join entries based on Hartig's heuristic for plan selection in link traversal environments
as described in "Zero-Knowledge Query Planning for an Iterator Implementation of Link Traversal Based Query Execution".

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 @comunica/actor-rdf-join-entries-sort-traversal-zero-knowledge
```

## Configure

After installing, this package can be added to your engine's configuration as follows:
```text
{
  "@context": [
    ...
    "https://linkedsoftwaredependencies.org/bundles/npm/@comunica/actor-rdf-join-entries-sort-traversal-zero-knowledge/^2.0.0/components/context.jsonld"
  ],
  "actors": [
    ...
    {
      "@id": "urn:comunica:default:rdf-join-entries-sort/actors#traversal-zero-knowledge",
      "@type": "ActorRdfJoinEntriesSortTraversalZeroKnowledge"
    }
  ]
}
```