@comunica/actor-rdf-parse-html

Comunica HTML RDF Parse Actor

An RDF Parse actor that handles RDF in HTML, by delegating to the RDF Parse HTML bus. It creates an HTML parser, and delegates its events via the RDF Parse HTML bus to other HTML parsing actors.

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-parse-html

Configure

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

{
  "@context": [
    ...
    "https://linkedsoftwaredependencies.org/bundles/npm/@comunica/actor-rdf-parse-html/^1.0.0/components/context.jsonld"  
  ],
  "actors": [
    ...
    {
      "@id": "config-sets:rdf-parsers.json#myRdfParserHtml",
      "@type": "ActorRdfParseHtml",
      "priorityScale": 0.2
    }
  ]
}

Config Parameters

• caam:Actor/AbstractMediaTypedFixed/priorityScale: An optional priority for this parser, used for content negotiation, defaults to 1.

Changelog

v1.22.0 - 2021-08-30

Added

• Add support for SPARQL extension functions
• Allow custom fetch function to be provided via context
• Support AbortControllers in native http actor
• Report FILTER errors as warnings in the logger, Closes #767
• Add SPARQL endpoint-based hypermedia update actor
• Allow resource creation via HTTP PUT:
  • Add RDF update hypermedia actor for LDP PUT destinations
  • Configure RDF update hypermedia actor for LDP PUT destinations
  • Allow RDF dereference actors to return on non-200 responses
  • Add metadata extractor for HTTP Accept-Put header
  • Add metadata extractor for HTTP Allow header

Changed

• Refactor CLI arguments handling using yargs
• Optimize node-fetch HTTP actor and set as default
• Include response body in dereference errors
• Bump fetch-sparql-endpoint with improved error reporting for SPARQL endpoints
• Update dependency htmlparser2 to v7 (#851)
• Migrate to @rdfjs/types
• Bump to sparqlalgebrajs 3
• Notify downstream clients on worker timeout
• Bump fetch-sparql-endpoint with AbortControllers
• Make HTTP accept headers deterministic
• Add URL-based heuristic to determine SPARQL endpoints to top-level actor

Fixed

• Update to AsyncIterator 3.2.0 to fix memory issue
• Fix http proxy not working with immutable node-fetch response
• Fix invalid hash implementation for hash-join
• Fix node-fetch actor not supporting body.cancel
• Do not reset sparql.js blank-node counter (Closes #836)
• Fix SPARQL-based update actors not being able to handle quads

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