OntoUML

The OntoUML/UFO Catalog is a comprehensive catalog of OntoUML and UFO ontology models, serving as a robust, structured, and open-source platform for Ontology-Driven Conceptual Modeling Research. Established with a vision to foster collaborative work and ensure seamless accessibility for all its users, it embeds itself as a pivotal tool, not only for the OntoUML and UFO communities but also for the broader spectrum of conceptual modeling researchers and practitioners. Its aim is to allow empirical research across these areas by supplying curated, structured, and machine-processable data that elucidate the 'why', 'where', and 'how' of various modeling methodologies and applications.

The OntoUML/UFO Catalog presents a rich set of models, crafted by modelers with diverse expertise, across assorted domains, and for different purposes, ensuring it encompasses a broad sweep of use-cases and applications. These models, available in machine-readable formats such as JSON and Turtle, ensure easy and persistent accessibility via permanent identifiers.[8]

The OpenPonk, formerly known as DynaCASE, is a universal modeling platform developed at the Center for Conceptual Modelling and Implementation from the Faculty of Information Technology, CTU in Prague. The OpenPonk is characterized by simple, clean, accessible based architecture, pure object technology Pharo. Among other modeling languages, the OpenPonk provides support and features for OntoUML.[9]

Tonto, short for "Textual Ontology," is a user-friendly written language designed for creating ontology models. Developed using Typescript and the Langium tool, it produces a Visual Studio Code Extension with a Language server. Tonto's primary focus is to support the UFO foundational ontology, allowing for the detection of unnoticed ontology errors. It can be transformed into various languages, including UML (specifically OntoUML), OWL (for gUFO-based ontologies), Alloy, Common Logic, and the TPTP syntax. This language enables UFO-based annotations, high-order types for multi-level taxonomies, structured comments for documentation generation, precise constraint specifications, and ontology testing directives. Tonto's integration with source control tools like git simplifies ontology management, and its VS Code extension offers features like syntax verification, syntax highlighting, content assistance, and ontology visualization preview, all enhanced by integration with the OntoUML server for OWL transformation and database schema generation.

The OntoUML-JS is a Javascript library utility for manipulating OntoUML models.[6]

The OntoUML Vocabulary is an implementation of the OntoUML Metamodel in the Web Ontology Language (OWL) that is easily interoperable with ontouml-js and ontouml-schema.[10]

The OntoUML Schema defines a JSON Schema message format for the exchange of OntoUML models.[9]

This project is defined under the umbrella of the OntoUML Server project.

The OntoUML JSON2Graph application transforms compliant JSON files into OntoUML Vocabulary adherent graph files, allowing users to select the depth of model representation and perform semantic and syntactical checks. It supports various serialization formats like Turtle, RDF/XML, and JSON-LD.[11]

In 2006, Guizzardi co-founded the Ontology & Conceptual Modeling Research Group (NEMO)[12] located at the Federal University of Espírito Santo (UFES) in Vitória city, state of Espírito Santo, Brazil. Since then, NEMO has been responsible for most of the developments in OntoUML. These include tool support to the language both as extensions of UML production-grade tools to support OntoUML (e.g., the MDG for Enterprise Architect), as well as a standalone tool called the OntoUML Lightweight Editor (OLED) for the development, verification, validation, anti-pattern detection and rectification, verbalization and implementation of domain ontologies.

In 2016 a group of former students from NEMO founded Menthor, a startup aiming at providing ontology engineering-related products and services. Among these products, they offer the Menthor Editor, an open-source ontology engineering tool for dealing with OntoUML models. It also includes OntoUML syntax validation, Alloy simulation,[2][3] Anti-Pattern verification,[4] and MDA transformations from OntoUML to OWL,[5][6] SBVR and Natural Language (Brazilian Portuguese). Menthor Editor is derived from OLED.

In 2017, as an initiative championed by the Czech Technical University in Czech Republic, an OntoUML portal has been launched.[13]