# protegeproject/protege

Protege Desktop

Repository: https://github.com/protegeproject/protege
Canonical: https://ross.abutalabs.com/products/protege
Homepage: http://protege.stanford.edu
Language: Java
License: NOASSERTION
License Family: other
Topics: protege, protege-desktop, ontology, owl, obo, ontology-engineering, knowledge-graph, knowledge-management, java, reasoning, rdf, semantics
Last push: 2026-04-05T19:31:49+00:00

## Health v2 (maintenance only)
Score: 71/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 75, release rhythm 50, longevity 100
- inputs: {"age_days": 4762, "days_push": 150, "days_rel": 179, "gap_med": 130.5, "n_releases_24m": 5}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1473, forks 304 (observed 2026-08-28T04:04:49.652325+00:00)

## What it is
Protege Desktop is a free, open-source ontology editor supporting the OWL 2.0 standard, built in Java with a pluggable architecture. It is used to create, edit, and reason over ontologies and knowledge graphs.

## Use cases
- edit OWL ontologies
- build a knowledge graph schema
- run reasoning over an ontology
- convert between RDF and OWL formats
- develop OBO ontologies for biomedical use
- teach ontology engineering

## When to choose
- you need a mature GUI for authoring OWL 2 ontologies
- you want plugin extensibility and reasoner integration
- you work with RDF, OBO, or knowledge graphs

## When to avoid
- you need a lightweight command-line ontology tool
- you want a web-based collaborative editor (consider WebProtégé)
- you need non-semantic data modeling

## Facets
- artifact type: application
- maturity: active
- function: editor, gui, plugin-system
- domain: developer-tools
- platform: cross-platform, jvm
- tags: ontology-editor, owl, rdf, knowledge-graph, reasoner, semantic-web, knowledge-management, desktop

## Member repositories
- protegeproject/protege (main) score 71

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:49.652325+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:34:38.949345+00:00, confidence not recorded.
  - readme: https://github.com/protegeproject/protege (fetched 2026-08-28T04:04:49.652325+00:00, sha 1aef148db4e7)
- Data as of 2026-08-30T08:39:29.467469+00:00.