Examples for @rdfjs/score

common.js

import housemd from 'housemd'
import rdf from 'rdf-ext'

const ns = {
  rdf: rdf.namespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#'),
  schema: rdf.namespace('http://schema.org/')
}

// import he House M.D. dataset
const dataset = rdf.dataset(housemd({ factory: rdf }))

// get all subject named nodes in the dataset
const subjects = rdf.termSet(
  rdf.clownface({ dataset })
    .in()
    .filter(ptr => ptr.term.termType === 'NamedNode')
    .terms
)

// get all literal objects in the dataset
const literals = rdf.termSet(
  rdf.clownface({ dataset })
    .has(ns.rdf.type, ns.schema.Person)
    .out(ns.schema.givenName)
    .filter(ptr => ptr.term.termType === 'Literal')
    .terms
)

// the input structures that will be handed over to the score functions
const input = { dataset, terms: subjects }
const inputLiterals = { dataset, terms: literals }

export {
  input,
  inputLiterals,
  ns
}

example1.js

import rdf from 'rdf-ext'
import { input } from './common.js'

function example () {
  const results = rdf.score.sort(rdf.score.pageRank()(input))

  for (const result of results) {
    console.log(`${result.term.value} (${result.score})`)
  }
}

example()

example2.js

import rdf from 'rdf-ext'
import { input, ns } from './common.js'

function example () {
  const results = rdf.score.sort(
    rdf.score.fallback([
      rdf.score.exists({ subject: rdf.namedNode('https://housemd.rdf-ext.org/person/lisa-cuddy') }),
      rdf.score.product([
        rdf.score.type(ns.schema.Person),
        rdf.score.pageRank()
      ])
    ])(input)
  )

  for (const result of results) {
    console.log(`${result.term.value} (${result.score})`)
  }
}

example()

example3.js

import rdf from 'rdf-ext'
import { inputLiterals } from './common.js'

function example () {
  const results = rdf.score.sort(rdf.score.language(['en', 'de', '*'])(inputLiterals))

  for (const result of results) {
    console.log(`${result.term.value} (${result.score})`)
  }
}

example()

package.json

{
  "name": "rdfjs-score-examples",
  "version": "0.0.0",
  "description": "Examples for @rdfjs/score",
  "type": "module",
  "main": "example1.js",
  "author": "Thomas Bergwinkl <bergi@axolotlfarm.org> (https://www.bergnet.org/people/bergi/card#me)",
  "license": "MIT",
  "dependencies": {
    "housemd": "^0.1.0",
    "rdf-ext": "^2.1.0"
  }
}