@comunica/actor-rdf-resolve-quad-pattern-string-source

Comunica String Source RDF Resolve Quad Pattern Actor

An RDF Resolve Quad Pattern actor that handles string-based source.

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.

This actor enables to the possibility to provide data sources using the context in the form of a string. The source must respect the rdf serialization supported by comunica. Here an example of a source provided by the context

{ sources: [{ type: 'stringSource', value: `<ex:s> <ex:p> <ex:o>. <ex:s> <ex:p> <ex:z>.`, mediaType: 'text/turtle', baseIri: 'http://example.org/' }]}

Install

$ yarn add @comunica/actor-rdf-resolve-quad-pattern-string-source

Configure

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

{
  "@context": [
    ...
    "https://linkedsoftwaredependencies.org/bundles/npm/@comunica/actor-rdf-resolve-quad-pattern-string-source/^2.0.0/components/context.jsonld"  
  ],
  "actors": [
    ...
    {
      "@id": "urn:comunica:default:rdf-resolve-quad-pattern/actors#string-source",
      "@type": "ActorRdfResolveQuadPatternStringSource",
      "mediatorRdfParse": { "@id": "urn:comunica:default:rdf-parse/mediators#parse" },
      "mediatorRdfResolveQuadPattern": { "@id": "urn:comunica:default:rdf-resolve-quad-pattern/mediators#main" },
      "beforeActors": { "@id": "urn:comunica:default:rdf-resolve-quad-pattern/actors#hypermedia" }
    }
  ]
}

Config Parameters

• cacheSize: The maximum number of parsed stores in the LRU cache, set to 0 to disable, defaults to 100.
• mediatorRdfParse: A mediator over the RDF Parse bus.
• mediatorRdfResolveQuadPattern: A mediator over the RDF resolve quad pattern bus.

Changelog

v2.10.0 - 2023-10-27

Added

• Convert raw source contexts to ActionContexts
• Support relative and absolute paths for COMUNICA_CONFIG

Changed

• Log expression error messages
• Print log levels in different colors
• Update readable-stream, yargs, lerna, typescript and eslint (#1271)

Fixed

• Fix wrong cardinality for zero-or-one paths with one variable
• Support building with esModuleInterop TS flag
• Skip calling endsWith on mediaType when mediaType is undefined

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