README

PROV4ITDaTa:web-app serves as the backend for the PROV4ITDaTa platform, its main tasks are:

• Managing authorization of a user with a Service Provider (e.g. Flickr, Imgur, etc.)
• Injecting authorization credentials into RML Mappings
• Executing RML Mappings on the RML Mapper, and providing the results to the client-side

Technical details can be found in docs/REPORT.md.

Setup: RMLMapper Web API

For some of the use cases defined below, the RMLMapper Web API needs to be running.

The RMLMapper Web API must be set up using a specific version of the RMLMapper. You can find the corresponding JAR here, or you can download it from the commandline as follows:

curl -L https://cloud.ilabt.imec.be/index.php/s/sGqqBNWYFBJ6iLA/download --output rmlmapper.jar

Assuming you have the downloaded the JAR to the current directory, you can run the RMLMapper Web API using this JAR as follows

rmlmapper-webapi -r rmlmapper.jar

By default, this will serve the RMLMapper Web API at http://localhost:4000/.

Setup: web-app

You can configure the environment using the app-config.json file:

• To run the web-app locally, set the environment value to dev. Don't forget to specify the url of the RMLMapper Web API using the rmlmapper_webapi property.
• To run the web-app on the testbed, set the environment value to testbed. Don't forget to specify the url of the RMLMapper Web API using the rmlmapper_webapi property.

Each app-config refers to a json file (template at config.template.json) that contains all credentials. Check the respective Data Provider APIs as to how to specify all credentials.

Install the web-app as follows:

yarn install

Once the installation is completed, we have to install and build the user-interface (@prov4itdata/ui). This can be done by running the ui:all script:

yarn run ui:all

Run the web-app using:

yarn run start

Run the web-app in development mode using:

yarn run start:dev

Use cases

Use case: Transfer data

1. Navigate to the web-app (depends on the configuration in app-config.json).
2. If you aren't already logged in to your Solid pod, you will be redirected to the login page.
3. The web-app's home page will show a dropdown menu where you can select a mapping to be executed. When selecting a mapping, it will be shown in the RML Rules card. Click the card to expand/collapse.
4. When clicking "Execute", the generated output and provenance will available in the "Generated RDF" and "Provenance" cards respectively. The generated output will be stored on the Solid pod.
5. You can download the RML rules, generated output, and provenance using the corresponding "Download"-button in each card.
6. Verify what is stored on the Solid pod using the controls in the Solid-card. It is also possible to delete the file afterwards.

License

This code is copyrighted by Ghent University – imec and released under the MIT license.