The BioSphere ontology portal provides access to all the tools developed by this project. Once you have an account, and have logged in, you will have access to help pages to guide you through the user interface. Here we describe the versioning and curation model that is implemented:

Tools developed under the previous COBrA-CT project are also maintained here

The COBrA-CT tools include two plug-ins for the Protege Ontology Editor: the OBO Explorer and the OBO Ontology Metadata editor tabs. These tools can be used to create bio-ontologies and to edit the synonym and database cross-reference data that is associated with OBO terms. They should be used with the OBOConverter tab that allows OBO formatted ontologies to be converted into OWL, and OWL bio-ontologies to be saved in OBO format.
These two Protege plug-ins implement an interface to the agreed OWL representation for OBO. More information about the mapping from OBO to OWL can be found on the Wiki:

All COBrA-CT tools can be downloaded from the Downloads page.

OBO Explorer (click image to enlarge view)

The OBO tabs work as integrated components of Protege to allow the bio-informatician to work with OBO ontologies in a familiar manner, while being able to take advantage of the many other OWL tools that have been developed by the Protege community.

Version Manager (click image to enlarge view)

The version manager is a standalone Java tool that allows users to download and upload OWL ontologies to a central database. This tool manages ontology versions and records the version number, user and ontology names as well as the history of splitting and joining of versions. Users can share their ontologies will other selected users. Ontologies can be declared 'public' and so are accessible to all users. Uploading ontologies requires users to register, however, guest users can download public ontologies without registering. An eXist database running within OGSA-DAI stores ontologies as XML documents. The client tool uses the OGSA-DAI client toolkit to connect to the database via web services.