Main changes from v2 to v3


This page describes the main changes with respect to the version 2 used by the original ORR instance at for a number of years.

Version 3 brings many significant improvements, which are summarized below.

Were you a version 2 user?

If you were a user of version 2 and are going to exercise the new version 3, please keep in mind the following:

  • Once you open in your browser, make sure to perform a hard reload of the page to avoid potential issues related with cached resources from the previous version.
  • Your username and password should continue to work but you will need to login in the new version.
    • Forgot your username? Click the 'Get username' button in the 'Sign in' dialog; enter your email address and your username will be sent to you.
    • Forgot your password? Click the 'Reset password' button in the 'Sign in' dialog; enter your username and an email with further instructions will be sent to you.
  • If you used the preliminary HTTP interface for programmatic registration of ontologies, v3 brings a much more improved RESTful interface.

Summary of major changes

Aspect v3
Ontology search Faceted based
ORR vocabulary/mapping dispatch Significantly Improved
Admin interface Included
Proper vocabulary/mapping formats Yes1
Organization (authority) support Significantly improved2
Authorization/permissions Significantly improved2
Authentication Significantly improved3
Support for multiple classes in ORR vocabularies Yes
Ontology input formats RDF/XML, N3, OWL/XML, JSON-LD, Turtle, N-Triples, RDF/JSON
Ontology output formats RDF/XML, N3, JSON-LD, Turtle, N-Triples, N-Quads, RDF/JSON
Self-resolvable HTML resolution of IRI/URI Direct dispatch4

At a more technical level, the major changes include:

Aspect v3
Installability/branding Fully supported (including Docker-based installation)
HTTP interface RESTful
Database dependencies MongoDB
Performance of ontology requests Significantly improved
HTTP toolkit (backend) Scalatra5
Front-end toolkit Angular
Unit/integration testing More comprehensive
Continuous integration Yes6

  1. The explicit formats allow not only more effective internal handling, but facilitate the support of some user-level features (e.g., preservation of column order in ORR vocabularies.) 

  2. Organizations are explicitly modeled in v3. An organization has members, and only members can register ontologies for that organization. (Note: A user can also register his/her own ontologies.) 

  3. Authentication is based on JSON Web Tokens and Basic Authentication

  4. Direct dispatch means that the original ontology IRI (in the case of URL) is retained in the browser URL field. In the previous version v2, redirection to the different base location (/orr) very often caused confusion to users regarding the proper IRI for ontology identification. 

  5. However, other HTTP frameworks, apparently much more actively maintained in comparison, may be considered in a future version including Akka HTTP and Play

  6. We use Travis CI ( Backend service: Frontend: