This document describes the knowledge base of the OntoCommons project, which is developed using a designated platform named OntoCommons Collaborative Editing and Authoring kNowledge graphS (OCEANS), used for recording the knowledge generated in the project in a machine-readable fashion, and visualised through knowledge graphs. The OCEANS platform is developed on the basis of an open-source collaborative environment supporting RDF/OWL named WebProtégé. While retaining most of the features of WebProtégé, the OCEANS develops a new feature on top of it and customises the user interface to better suit the needs of OntoCommons. The aim of creating the knowledge base is to ensure that all the information generated within Work Package 4 (WP4) and across Work Packages (WPs) is encoded into machine-readable knowledge graphs that describe the ontology commons ecosystem toolkit and beyond.
In the first version of the ontology ecosystem knowledge graph, we primarily report the following outcomes: (1) the definition of the ontology ecosystem knowledge base and knowledge graph, (2) the content model of the ontology ecosystem knowledge base, (3) the requirement analysis for the collaborative editing and authoring platform, (4) the architecture of OCEANS, (5) the first version of the ontology ecosystem knowledge base and knowledge graphs, and (6) the future directions for the ontology ecosystem knowledge graph, second version (D4.8).