CIDER-EM

Context and Inference baseD ontology alignER.

CIDER-EM is a word-embedding-based system for monolingual and cross-lingual ontology alignment deveoped by the SID group (University of Zaragoza). It evolves the CIDER-CL tool, deveoped at OEG (Universidad Politécnica de Madrid) and SID (University of Zaragoza) by including the use of word embeddings.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see [http://www.gnu.org/licenses/].

Features

It operates as aligner between two ontologies
It aligns classes and properties, but not instances.
The REST Api can currently operate in monolingual mode:
- Monolingual.
  - It gets the word embeding from the ontology's language.
  - It computes the word-embedding-based value of the relatedness between two entities from two ontologies in the same language.
  - It performs elementary computations of "cosine similarity" to compare several features of the ontological description of the compared entities.
  - Such features are combined by means of multilayer perceptrons (one for classes and another one for properties) to produce a final value.
This aligner is not intended to operate with large ontologies.

Currently, the REST Api has the following endpoints:

POST /align/entities. Given the URIs of two ontologies and two ontology elements, and a language code, return the cosine similarity between the two ontology entities. The body should have the following format (example):

{
  "uri1": "http://oaei.ontologymatching.org/2011/benchmarks/101/onto.rdf#author",
  "uri2": "http://oaei.ontologymatching.org/2011/benchmarks/203/onto.rdf#author",
  "onto1": "http://oaei.ontologymatching.org/2011/benchmarks/101/onto.rdf",
  "onto2": "http://oaei.ontologymatching.org/2011/benchmarks/203/onto.rdf",
  "lang": "en"
}

A successful result will look as follows:

{
    "uri1": "http://oaei.ontologymatching.org/2011/benchmarks/101/onto.rdf#author",
    "uri2": "http://oaei.ontologymatching.org/2011/benchmarks/203/onto.rdf#author",
    "onto1": "http://oaei.ontologymatching.org/2011/benchmarks/101/onto.rdf",
    "onto2": "http://oaei.ontologymatching.org/2011/benchmarks/203/onto.rdf",
    "lang": "en",
    "similarity": 0.9739285255652004
}

GET /align/ontologies?uri1={uri1}&uri2={uri2}, e.g. /align/ontologies?uri1=http://oaei.ontologymatching.org/2011/benchmarks/101/onto.rdf&uri2=http://oaei.ontologymatching.org/2011/benchmarks/203/onto.rdf Given the URIs of two ontologies, return an ontology alignment in RDF following the Alignment Format. This request can take up to ~1h 30min to finish.

Installation

Requirements: To run this API locally, please ensure that you have Java and the build automation tool Maven installed.

To install the project locally, follow these steps:

Download some word embeddings here. They need to be placed in the following path: src/main/resources/word-embeddings directory.
In the root directory, run the command mvn install .
Once the project has been successfully built, run in the same directory the command java -jar target/cider-em-0.0.1-SNAPSHOT.jar to start the server.
Access the API at http://localhost:8080 .

As an alternative, there is a Docker image at https://hub.docker.com/r/pretallod/link-cider-em (note its size is ~9GB).

Note: This version is under development. You can find the last working version of the aligner here.

Pret-a-LLOD/CIDER-EM-api

CIDER-EM

Features

Installation