Three independently built implementations of the OMG standard — a Go runtime, a Rust toolchain, and OMG's own reference build — reading and writing the same models, with an open, version-controlled store underneath to hold what they produce. No seat licenses. No vendor lock-in. Clone it, build it, run it today.
Four projects, independently maintained, built against the same open interfaces — a runtime, a toolchain, the reference implementation itself, and a model store to tie them together.
A complete SysML v2 and KerML implementation in Go — language server, interactive REPL, and an execution runtime that instantiates parts, evaluates constraints, and runs action and state behavior on a clock, not just validates them. Ships with Python, Node, Java, Rust, Julia and MATLAB clients over gRPC, a Jupyter kernel, and VS Code, SysON and MDK plugins.
Site View on GitHub Try the RuntimeA Rust workspace covering parsing, formatting, linting, JSON/CBOR interchange, constraint solving, and span-preserving model transformation, plus a language server and Python and WebAssembly bindings. Built for programmatic pipelines and CI, not just editing.
View on GitHubThe OMG Systems Modeling Community's own implementation — Eclipse Xtext editors, PlantUML visualization, and a Jupyter kernel. Both projects above track its grammar and standard library as their conformance baseline; this is the ground truth.
View on GitHubA collection of microservices forming a version-controlled home for model data whose native form is RDF — a model is a graph other tools can query, diff, and merge, not a file they have to reparse. One SPARQL 1.1 quadstore underneath, JSON Web Tokens between services, and a SysML v2 API layer built on top of it, so it plugs into the same open interchange the tools above already speak.
View on GitHubOpenSysML isn't a single product — it's a stack plus the people, standards bodies, and growing library ecosystem around it.
Guides, decisions, and working notes for the project — the place to read up before digging into any one tool in the stack. Content is CC BY 4.0, separate from the code licenses above.
Read the wikiThe Object Management Group's home for the SysML specification itself — the standard that every project in the stack implements.
Visit OMG SysMLThe International Council on Systems Engineering — the professional society behind much of the practice and methodology SysML v2 is built to support.
Visit INCOSEThe Open Model-Based Engineering Environment — open-source tooling for managing, integrating, and publishing systems models at scale, and the broader community OpenSysML grew out of.
Visit OpenMBEEParsers, exporters, editor integrations, and other open-source libraries built around SysML v2. Reach out through the wiki to get yours listed as this space grows.
See what's listed so farWhere the runtime is built: the documentation site with the handbook, CLI/REPL reference and measured compliance status, and the Open-MBEE/OpenSysML repository — issue forms for tool bugs, specification gaps and ruling objections, and GitHub Discussions for questions and ideas.
Site Open an issue Discussions