Corpus2graph-pipeline NPM

Corpus to Graph Pipeline

Corpus to Graph pipeline is a module that processes documents from a public repository (corpus), performs entity extraction + scoring on them and outputs the data into a database in the form of entity-relation graph.

Solution Architecture

Architecture Diagram

The elements in play in this solution are as follows:

Element	Description
Public Repository	External repository that supplies new documents every day
Trigger Web Job	Scheduled to run daily and trigger a flow
Query Web Job	Queries for new document IDs (latest)
Parser Web Job	Divides documents into sentences and entities
Scoring Web Job	Scores sentences and relations
External API	API (url) that enables entity extraction and scoring
Graph Data	Database to store documents, sentences and relations

Web Jobs

There are 3 web jobs in the bundle

Web Job	Description
Trigger	A scheduled web job that triggers a daily check for new document Ids
Query	Queries documents according to date range provided through Trigger Queue and insert all unprocessed documents to New IDs Queue
Parser	Processes each document in New IDs Queue into sentences and entities and pushes them into Scoring Queue
Scoring	Scores each sentence in the Scoring Queue via the Scoring Service

To get more information on the message api between the web jobs and the queues see Corpus to Graph Pipeline - Message API

Pipeline Logic Interface

If you have a document repository and you'd like to run it through the corpus to graph pipeline you will need to provide an implementation of the following pipeline logic interface:

pipeline-logic-interface.js: 1. getNewUnprocessedDocumentIDs - Retrieves IDs of unprocessed documents in the following format:

var documents = [
  {
    sourceId: 1,
    docId: '85500001'
  },
  {
    sourceId: 2,
    docId: '90800001'
  }
];

getDocumentSentences - Gets an array of sentences in following format (you can also provide entities alongside the sentences):

var sentencesArray = {
  "sentences": [
    {
      "sentence": "This is a sentence about entity-1 and entity-2.",
      "mentions": [
        {
          "from": "25", 
          "to": "32", 
          "id": "1234", 
          "type": "entityType1", 
          "value": "entity-1"
        }, 
        {
          "from": "38", 
          "to": "45", 
          "id": "ABCD", 
          "type": "entityType2", 
          "value": "entity-2"
        }
      ]
    }, 
    {
      "sentence": "This sentence also contains entity-1 and entity-2.",
      "mentions": []
    }
  ]
};

getSentenceEntities - Gets the entities array for a retrieved sentence
You can implement the methods getSentenceEntities and getDocumentSentences separately, or use getDocumentSentences to get both sentences and entities (as is done in the stub).
getScoring - Scores a sentence with mentions and return the score in the following format:

var result = {
  entities: [
    {
      id: "1234",
      name: "entity-1",
      typeId: 1
    },
    {
      id: "ABCD",
      name: "entity-2",
      typeId: 2
    }
  ],
  relations: [
    {
      entity1: {
        id: "1234",
        name: "entity-1",
        typeId: 1
      },
      entity2: {
        id: "ABCD",
        name: "entity-2",
        typeId: 2
      },
      modelVersion: "0.1.0.1",
      relation: 2,
      score: 0.8,
      scoringServiceId: "SERVICE1"
    }
  ]
};

You have an example on how to implement this interface here: Pipeline Logic Stub