owl2jsonschema.js

WIP

Do not use for production yet. Might change or rename at anytime. Please do report bugs!

Convert OWL / RDFS / XML Schema to JSON Schema.

OWL 2 JSON SCHEMA wants to build a bridge between the semantically XML web and the semantically JSON web and is a converter from OWL as RDF/XML to JSON Schema (currently draft 4). Full XML Schema support will come soon. For now an OWL Ontology is required.

Why?
Most ontologies on the web use OWL+RDF/XML or RDF/Turtle or RDF/NTriples (which translate 1:1 to RDF/XML).
spec.:

"The primary exchange syntax for OWL 2 is RDF/XML; this is indeed the only syntax that must be supported by all OWL 2 tools."

So RDF/XML Schema is Lingua Franca. Let us create a canonical JSON representation for this.

It is planned to support several proposals for JSON Schema v5 draft which close gaps between OWL and JSON Schema. For example

• translations
• switch
• propertyLinks

So whenever the documentation refers to "JSON Schema" it means :
"JSON Schema and hyperschema - including the above mentioned inofficial proposals".

This is nightly written from scratch, might currently contain bugs and is incomplete.
Currently working on: The resolving of external URIs and Ontologies.

Supported platforms

node.js >= 0.10.0

Installation

For now

git clone https://github.com/redaktor/owl2jsonschema.js.git

cd owl2jsonschema.js

npm install

A demo is included. It will create the JSON Schemas of the dbpedia Ontology.
This will create the schema files in demo/OUTPUT:

node demo

Usage

var owl2jsonschema = require('owl2jsonschema');
var parser = new owl2jsonschema(/*[options object]*/);

and now parse url OR file OR string

// url, options, callback

parser.parse('http://mappings.dbpedia.org/server/ontology/export' /*, [callback function]*/ );

OR
// filepath, options, callback
(if filepath is relative then './' is the folder of your script)

parser.parse('./export.xml' /*, [callback function]*/);

OR
// string, options, callback

parser.parse('<?xml><rdf:RDF><owl:Ontology>...</owl:Ontology>...</rdf:RDF>' /*, [callback function]*/);

This will write JSON schema files - you can specify options - see the code for now. Several Database support is planned within the redaktor boilerplate.

Contributing

1. Fork it!
2. Create your feature branch: git checkout -b my-new-feature
3. Commit your changes: git commit -am 'Add some feature'
4. Push to the branch: git push origin my-new-feature
5. Submit a pull request :D

History

TODO: Write history

Credits

Once OWL/RDFS is transformed, this uses the logic of schema-org-gen by Geraint Luff.

License

TODO: Write license