# @comunica/actor-query-operation-group

> A group query-operation actor

Latest version **5.3.0** (published 2026-07-10) · MIT license · 0 weekly downloads

## Install

```sh
npm install @comunica/actor-query-operation-group
pnpm add @comunica/actor-query-operation-group
yarn add @comunica/actor-query-operation-group
bun add @comunica/actor-query-operation-group
```

## Health

**Score 55/100 (C)** — status: active.

Positive: no vulnerabilities; recently updated; high maintenance score.

Warnings: low downloads; no types; no esm support.

## Facts

| | |
|---|---|
| Version | 5.3.0 |
| Published | 2026-07-10 |
| First published | 2019-04-11 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 0 |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 580 |
| Maintainers | joachimvh, rubensworks, rubenverborgh, dexagod, jeswr |
| Keywords | comunica, actor, query-operation, group |

## Links

- npm: https://www.npmjs.com/package/@comunica/actor-query-operation-group
- Repository: https://github.com/comunica/comunica
- Homepage: https://comunica.dev/
- Issues: https://github.com/comunica/comunica/issues
- Funding: https://opencollective.com/comunica-association
- npm.io page: https://npm.io/package/@comunica/actor-query-operation-group

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## Recent versions

- 5.3.0 (latest) — 2026-07-10
- 4.4.2-alpha.49.0 (next) — 2025-10-22
- 5.2.3 — 2026-05-26
- 5.2.2 — 2026-05-03
- 5.2.0 — 2026-04-14
- 5.1.3 — 2026-01-30
- 5.1.0 — 2026-01-16
- 5.0.3 — 2026-01-12
- 5.0.2 — 2026-01-12
- 5.0.0 — 2026-01-08
- 4.5.0 — 2025-11-18
- 4.4.1 — 2025-09-25
- 4.4.0 — 2025-09-17
- 4.2.0 — 2025-04-29
- 4.1.0 — 2025-02-11
- … 102 more at https://npm.io/package/@comunica/actor-query-operation-group/versions

## README

# Comunica Group Query Operation Actor

[![npm version](https://badge.fury.io/js/%40comunica%2Factor-query-operation-group.svg)](https://www.npmjs.com/package/@comunica/actor-query-operation-group)

A [Query Operation](https://github.com/comunica/comunica/tree/master/packages/bus-query-operation) actor that handles [SPARQL `GROUP BY`](https://www.w3.org/TR/sparql11-query/#groupby) operations.

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-query-operation-group
```

## 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-group/^5.0.0/components/context.jsonld"
  ],
  "actors": [
    ...
    {
      "@id": "urn:comunica:default:query-operation/actors#group",
      "@type": "ActorQueryOperationGroup",
      "mediatorQueryOperation": { "@id": "#mediatorQueryOperation" },
      "mediatorMergeBindingsContext": { "@id": "urn:comunica:default:merge-bindings-context/mediators#main" },
      "mediatorHashBindings": { "@id": "#mediatorHashBindings" },
      "expressionEvaluatorFactory": { "@id": "urn:comunica:default:expression-evaluator/evaluators#main" }
    }
  ]
}
```

### Config Parameters

* `mediatorQueryOperation`: A mediator over the [Query Operation bus](https://github.com/comunica/comunica/tree/master/packages/bus-query-operation).
* `mediatorMergeBindingsContext`: A mediator over the [Merge Bindings Context bus](https://github.com/comunica/comunica/tree/master/packages/bus-merge-bindings-context).
* `mediatorHashBindings`: A mediator over the [Hash Bindings bus](https://github.com/comunica/comunica/tree/master/packages/bus-hash-bindings).
* `expressionEvaluatorFactory`: A factory to create an [Expression Evaluator](https://github.com/comunica/comunica/tree/master/packages/expression-evaluator);

---
_Source: https://npm.io/package/@comunica/actor-query-operation-group · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._