jsonld-expandable

The Expandable derive macro: it generates expanded JSON-LD straight from your own Rust structs, with no intermediate serde_json::Value and no context processing at runtime. Field attributes cover @id, @type, typed and IRI coercions, list, set, language and index containers, nesting, flattening and more.

#[derive(Expandable)]
#[jsonld(type = "ex:Sensor", prefix(ex = "https://example.com/"))]
struct Sensor {
    #[jsonld(id)]
    id: String,
    #[jsonld(property = "ex:temperature", coerce = "xsd:double")]
    temperature: f64,
}

let doc: serde_json::Value = sensor.expand();

This crate is the proc-macro shell. The traits the generated code calls live in jsonld-expandable-core, and one of the two has to be a dependency of the crate that derives: either the umbrella jsonld with an expandable feature, which re-exports both, or jsonld-expandable-core directly. The derive reads your manifest to work out which, and follows a renamed dependency to the name you gave it.

The full attribute reference is in the derive's documentation.

Status: experimental. Version numbers move fast and there is no compatibility promise before 1.0. The workspace README says what that means in practice.

License

Dual-licensed, same as upstream. Pick whichever fits:

• Apache-2.0
• MIT