A comunica SPARQL HDT Init Actor.
This module is part of the Comunica framework.
HDT requires GCC 4.9 or higher to be available.
$ yarn add global @comunica/actor-init-sparql-hdt
or
$ npm install -g @comunica/actor-init-sparql-hdt
Show 100 triples from a HDT file:
$ comunica-sparql-hdt hdtFile@myfile.hdt "CONSTRUCT WHERE { ?s ?p ?o } LIMIT 100"
Show the help with all options:
$ comunica-sparql-hdt --help
Just like Comunica SPARQL,
a dynamic variant (comunica-dynamic-sparql-hdt
) also exists.
This engine can be used in JavaScript/TypeScript applications as follows:
const newEngine = require('@comunica/actor-init-sparql-hdt').newEngine;
const myEngine = newEngine();
const result = await myEngine.query('SELECT * WHERE { ?s ?p <http://dbpedia.org/resource/Belgium>. ?s ?p ?o } LIMIT 100',
{ sources: [ { type: 'hdtFile', value: '/path/to/my/file.hdt' } ] })
result.bindingsStream.on('data', (data) => console.log(data.toObject()));
Start a webservice exposing http://fragments.dbpedia.org/2015-10/en via the SPARQL protocol, i.e., a SPARQL endpoint.
$ comunica-sparql-hdt-http "{ \"sources\": [{ \"type\": \"file\", \"value\" : \"/path/to/my/file.hdt" }]}"
Show the help with all options:
$ comunica-sparql-hdt-http --help
The SPARQL endpoint can only be started dynamically.
An alternative config file can be passed via the COMUNICA_CONFIG
environment variable.
Use bin/http.js
when running in the GitHub repo.