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@comunica/actor-rdf-metadata-extract-sparql-service

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Comunica RDF metadata extract actor that parses SPARQL Service Descriptions

Package Exports

    This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@comunica/actor-rdf-metadata-extract-sparql-service) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

    Readme

    Comunica SPARQL Service RDF Metadata Extract Actor

    npm version

    An RDF Metadata Extract actor that extracts SPARQL Service Description metadata.

    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-metadata-extract-sparql-service

    Metadata entries

    This actor adds the following entries to the metadata object.

    • sparqlService: Value of http://www.w3.org/ns/sparql-service-description#endpoint.
    • defaultGraph: Value of http://www.w3.org/ns/sparql-service-description#defaultGraph.
    • defaultDataset: Value of http://www.w3.org/ns/sparql-service-description#defaultDataset.
    • unionDefaultGraph: Boolean flag set when the service declares http://www.w3.org/ns/sparql-service-description#UnionDefaultGraph feature.
    • basicFederatedQuery: Boolean flag set when the service declares http://www.w3.org/ns/sparql-service-description#BasicFederatedQuery feature.
    • inputFormats: List of http://www.w3.org/ns/sparql-service-description#inputFormat when available.
    • resultFormats: List of http://www.w3.org/ns/sparql-service-description#resultFormat when available.
    • supportedLanguages: List of http://www.w3.org/ns/sparql-service-description#supportedLanguage when available.
    • extensionFunctions: List of http://www.w3.org/ns/sparql-service-description#extensionFunction when available.

    Configure

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

    {
  "@context": [
    "https://linkedsoftwaredependencies.org/bundles/npm/@comunica/actor-rdf-metadata-extract-sparql-service/^4.0.0/components/context.jsonld"
  ],
  "actors": [
    {
      "@id": "urn:comunica:default:rdf-metadata-extract/actors#sparql-service",
      "@type": "ActorRdfMetadataExtractSparqlService"
    }
  ]
}

    Config Parameters

    • inferHttpsEndpoint: If HTTPS endpoints should be forcefully used if the original URL was HTTPS-based, defaults to true.