Crate nl3 

nl3

Natural language triples — parse short plain-English Subject–Predicate–Object phrases into validated triples.

You supply a grammar (the valid S-P-O relations) and a vocabulary (word-stem → predicate mappings), then Nl3::parse turns phrases into Triples, validating them and flipping reversed phrasings.

use nl3::Nl3;

let nl3 = Nl3::builder()
    .grammar(["users message users"])
    .vocabulary([("contact", "message"), ("msg", "message")])
    .build();

let triple = nl3.parse("user jack contacts user jill").unwrap();
assert_eq!(triple.subject.ty.as_deref(), Some("user"));
assert_eq!(triple.subject.value.as_deref(), Some("jack"));
assert_eq!(triple.predicate.value.as_deref(), Some("message"));
assert_eq!(triple.object.ty.as_deref(), Some("user"));
assert_eq!(triple.object.value.as_deref(), Some("jill"));

Re-exports

pub use tagger::LexiconTagger;

pub use tagger::Tagger;

Modules

tagger

Part-of-speech tagging. Ports the tagging half of lib/text/classify.js.

text

Text normalization helpers.

Structs

Nl3

A configured nl3 client. Create one with Nl3::builder. Ports the instance returned by the create factory in index.js.

Nl3Builder

Builder for Nl3.

Predicate

The predicate (relation) of a triple.

Term

One end of a triple — a subject or an object.

Triple

A parsed Subject–Predicate–Object triple.

Enums

Ambiguity

How to resolve an entity type that the grammar leaves ambiguous.

ParseError

An error produced while parsing a phrase into a triple.