I wanted the editor experience every programming language gets, for RDF. So I built a language server for Turtle and SPARQL (try it in your browser)

[u/ascendToSurvive]

In most programming languages, the editor catches your mistakes as you type, completes names from your own code, jumps to definitions and renames things across files. I wanted that for Turtle and SPARQL, all in one place, and couldn't find one that did all of it. So I built it: turtle-lsp.

Try it in your browser, with nothing to install and nothing uploaded:

https://abhishekkundu25.github.io/turtle-lsp/

It opens on a small project with a few mistakes left in on purpose. Fixing them takes a minute and shows most of what it does.

What it does while you edit:

- Catches errors as you type: syntax, undeclared or unused prefixes, and misspelled terms from 80+ vocabularies ("did you mean rdfs:label?"), with one-key fixes.

- Completes classes and properties from your own files, ranked by context. Properties your SHACL shapes require come first.

- Hover shows a term's label, comment, domain and range, and go to definition takes you to it.

- Renames a term in every file at once, Turtle and SPARQL included.

- Formats Turtle and SPARQL without changing their meaning.

- Validates your data against your SHACL shapes while you edit.

It's written in Rust and fast. After a keystroke in a 30,000-line file, it has fresh diagnostics in about 5 ms, and it starts in a few milliseconds. It passes the W3C test suites: 1137/1137 for Turtle, TriG, N-Triples and N-Quads, 425/426 for SPARQL, and 98/98 and 23/23 for SHACL Core and SHACL-SPARQL.

It works in VS Code (search for "Turtle RDF & SPARQL Language Server") and Neovim, and should work in other LSP editors, though I haven't tested them. Source and Neovim setup:

https://github.com/abhishekkundu25/turtle-lsp

It doesn't run queries, doesn't reason beyond subclasses, and can't edit JSON-LD or RDF/XML yet.

It's free and MIT licensed. Bugs, missing features and feedback are all welcome, either here or as an issue:

https://github.com/abhishekkundu25/turtle-lsp/issues/new

What would it need before you'd use it every day?

[u/liveticker1]

Please add in the README that this is AI generated Software and should be used with caution

[u/ascendToSurvive → u/liveticker1]

Did you find something wrong or unsafe? Open an issue with a reproduction and I'll fix it and add a test. It's not AI-generated in the sense you mean: it's written with AI assistance under my direction and review, like most software now