Inference

This service allows you to automatically generate inferences when resources are created, updated or deleted through LDP.

Features

• Extract the inverse relations from provided OWL files
• Automatically generate inverse links on create/update/delete operations
• Add or remove the triples directly to the triple store, in a single query
• Option to receive or offer inferences from remote servers (via ActivityPub)
• More inference types are planned in the future

Dependencies

• TripleStoreService
• LdpService
• RelayService (for inferences with remote servers)

Install

$ yarn add @semapps/inference

Usage

const { InferenceService } = require('@semapps/inference');

module.exports = {
  mixins: [InferenceService],
  settings: {
    baseUrl: "http://localhost:3000/",
    acceptFromRemoteServers: false,
    offerToRemoteServers: false,
    ontologies : [
      {
        "prefix": "pair",
        "owl": "http://virtual-assembly.org/ontologies/pair/ontology.ttl",
        "url": "http://virtual-assembly.org/ontologies/pair#"
      },
      ...
    ],
  }
};

Service settings

Property	Type	Default	Description
baseUrl	String	required	Base URL of the LDP server
acceptFromRemoteServers	Boolean	false	Accept inferences from remote servers (require RelayService)
offerToRemoteServers	Boolean	false	Offer inferences to remote servers (require RelayService)
ontologies	[Object]	required	List of ontology used (see example above)

Notes

• Remote inference is currently not available for Pod providers