JSON Schema in other languages

The Corvus JSON Schema evaluator is not only for .NET. The same evaluator, with the same behaviour, is available for JavaScript and TypeScript, Rust, Java and Kotlin, Go, Julia, Object Pascal, OCaml, Python, C, C++, Swift, Fortran, Ruby, PHP and R.

Language	Package	Install
.NET (C#)	Corvus.Text.Json.Validator (see also the runtime evaluator)	dotnet add package Corvus.Text.Json.Validator
JavaScript and TypeScript	@corvus-dotnet/json-schema	npm install @corvus-dotnet/json-schema
Rust	corvus-json-schema	cargo add corvus-json-schema
Java and Kotlin	io.github.corvus-dotnet:corvus-json-schema	Maven or Gradle
Go	github.com/corvus-dotnet/Corvus.JsonSchema/src-go/corvus-json-schema	go get github.com/corvus-dotnet/Corvus.JsonSchema/src-go/corvus-json-schema
Julia	CorvusJsonSchema	pkg> add CorvusJsonSchema
Object Pascal	The corvus-json-schema source package, for Free Pascal	Source archives
OCaml	corvus-json-schema, an opam package	opam pin add corvus-json-schema https://github.com/corvus-dotnet/corvus-json-schema-ocaml.git#v0.1.1
Python	corvus-json-schema, corvus-json-schema-rs	pip install corvus-json-schema-rs
C	The corvus-json-schema C library	Release packages
C++	The C library's header-only C++17 wrapper	Release packages
Swift	CorvusJsonSchema	Swift Package Manager
Fortran	corvus-json-schema, an fpm and CMake package	fpm (a git dependency) or CMake
Ruby	corvus_json_schema	gem install corvus_json_schema
PHP	corvus-dotnet/corvus-json-schema	pie install corvus-dotnet/corvus-json-schema
R	corvusjsonschema	install.packages("corvusjsonschema", repos = "https://corvus-dotnet.r-universe.dev")

What they share

• The same evaluator. Each is a port of, or built on a port of, the .NET runtime evaluator. The Rust crate is the engine behind the Python (Rust-backed), Ruby, PHP and R packages and the C library, and the C library is the engine behind the C++ wrapper and the Swift and Fortran packages. The JavaScript and pure-Python packages compile schemas into their own languages' code, and the Java library compiles them into JVM bytecode. The Go module is a port of the Rust crate's plans to Go, with no native code, and the Julia package, the Object Pascal package and the OCaml package are each a port of the Go module.
• The same results. Every implementation evaluates drafts 4, 6, 7, 2019-09 and 2020-12, passes the JSON-Schema-Test-Suite, and reports results at the Basic, Detailed and Verbose levels, with the same rows (evaluation path, schema location, instance location and message, in the same order). Annotations come grouped the same way everywhere: instance location, then keyword, then schema location, then value (in R, as the columns of a data frame). Results from any of them can be consumed the same way.
• The same patterns. pattern, patternProperties and the regex format are ECMA-262 regular expressions in every port, tested against V8's answers. How each port matches them, what it refuses and how it limits a match are in Patterns across the ports.
• The same options. The default dialect, format and content assertion, custom formats, a document resolver for remote references, a base URI, an entry point and a recursion limit, each named in its language's idiom.
• Fast validation. Each validates without collecting anything unless asked; results collection is a separate path that costs nothing when it is not used. The native implementations read their languages' own values in place, and validate JSON text without creating values for it.