RML (YARRRML) Editor

(yet simple) Text based editor to map JSON or CSV data with YARRRML (a human-readible form of RDF Mapping Language [RML]) to RDF.

The RML to YARRRML and vice versa is based on YARRRML-Parser.

To apply the mappings on the data an RML Mapper service is required. We use the Java library RMLMapper for this.

GUI also provides an option to save the RML mappings, download and manage them.

Screenshots

Deployment

This software consists of two parts: the GUI (VueJS 3) and the middleware (NodeJS).

Both have to be started manually or in docker.

Manually

Installation: npm install

Service: npm run service

GUI: npm run serve

Docker

Use the images from Github: ghcr.io/stream-project/rmleditor:master

In this repository is also an example docker-compose file.

To use the CRUD opertions, the instances should be run by docker-compose file.

To set the environment variables, refer to .env.template file.

Also don't forget to create a user for Virtuoso with SPARQL read, write and update permissions. Virtuso console can be accessed at <HOST>:8890

Usage as library

new MadamsEditor({
    // JSON DATA: url to a json ressource or JSON object as value
    'data': {
        'type': 'url' ,  // url|json
        'value': './dist/example-data.json',  // string|json
        'name': '' // string (required for json)
    },
    // MAPPING: url to yaml (yarrrml) ressource, or yaml (yarrrml) as string
    'mapping': {
        'type': 'url' , // url|yaml
        'value': './dist/example-mapping.yml', // string
        'name': '' // string (required for yaml)
    },
    // url to RML mapper service
    'rmlMapperUrl': 'http://localhost:3000/rmlmapper',
    // callback method after run
    run: function(mapping, result) { }
});

CD

Github Action does publish the docker image on Githubs registry. At the end of the workflow a webhook on the stream server is called which does redeploy the RMLEditor.

You could do it by yourself also: curl -v stream-dataspace.net:81/hooks/redeploy -H "Authorization: secret" --data "redeploy=rmleditor" -X POST The secret value could be found in the webhook config on the server.

Ressources

• RML
• YARRRML
• JSONPath, more JSONPath, JSONPath-Plus
• YARRRML-Parser
• RMLMApper
• Virtuoso Docker

Packages

npm packages
-------------

"@dvuckovic/vue3-bootstrap-icons": "^1.0.4",
"@rmlio/rmlmapper-java-wrapper": "^2.0.3",    #wrapper for a RML-mapper implementation for the RDF mapping language (RML)
"@rmlio/yarrrml-parser": "^1.3.5",            #convert YARRRML rules to RML or R2RML rules
"ace-builds": "^1.4.13",                      #code editor
"axios": "^0.24.0",
"bootstrap": "^5.1.3",
"core-js": "^3.20.0",
"cors": "^2.8.5",                             #providing a Connect/Express middleware that can be used to enable CORS with various options
"crypto": "^1.0.1"
"express": "^4.17.2",                         #Fast, unopinionated, minimalist web framework
"jquery": "^3.6.0",                           #fast, small, and feature-rich JavaScript library
"js-yaml": "^4.1.0",                          #implementation of YAML
"laravel-vue-pagination": "^3.0.0"
"n3": "^1.13.0",                              #The N3.js library is an implementation of the RDF.js low-level specification that lets you handle RDF in JavaScript easily. It offers: parsing, writing, storage
"sparql-http-client": "^2.4.0",
"splitpanes": "^3.0.6",
"underscore": "^1.13.2",                      #utility-belt library for JavaScript that provides support for the usual functional suspects (each, map, reduce, filter...) without extending any core JavaScript objects
"uuid": "^8.3.2",
"vue": "^3.2.26",
"vue-sweetalert2": "^5.0.2"                   #Good looking 
and easy to use modals
"vue-router": "^4.1.5"

Python packages
----------------

flask
waitress
Flask-Cors
requests
SPARQLWrapper

External docker images

• nginx
• Virtuoso Docker