Trait MultiVectorEmbedder 

pub trait MultiVectorEmbedder: Send + Sync {
    // Required methods
    fn embed_tokens(&self, text: &str) -> Result<MultiVectorEmbedding>;
    fn token_dimension(&self) -> usize;
    fn max_tokens(&self) -> usize;
    fn model_id(&self) -> &str;

    // Provided method
    fn embed_tokens_batch(
        &self,
        texts: &[&str],
    ) -> Result<Vec<MultiVectorEmbedding>> { ... }
}

Trait for models that produce token-level embeddings.

Unlike single-vector embedders (which produce one embedding per text), multi-vector embedders produce one embedding per token, enabling fine-grained late interaction scoring.

Example

use trueno_rag::multivector::{MultiVectorEmbedder, MockMultiVectorEmbedder};

let embedder = MockMultiVectorEmbedder::new(128, 512);
let embedding = embedder.embed_tokens("hello world").unwrap();

assert_eq!(embedding.num_tokens(), 2);
assert_eq!(embedding.dim(), 128);

Required Methods

fn embed_tokens(&self, text: &str) -> Result<MultiVectorEmbedding>

Embed text into token-level vectors.

Arguments

• text - Input text to embed

Returns

A MultiVectorEmbedding containing one vector per token.

fn token_dimension(&self) -> usize

Get the token embedding dimension.

fn max_tokens(&self) -> usize

Get the maximum tokens per document.

fn model_id(&self) -> &str

Get the model identifier.

Provided Methods

fn embed_tokens_batch( &self, texts: &[&str], ) -> Result<Vec<MultiVectorEmbedding>>

Batch embed multiple texts.

The default implementation calls embed_tokens sequentially. Implementations may override for more efficient batching.

Implementations on Foreign Types

impl<E: MultiVectorEmbedder + ?Sized> MultiVectorEmbedder for Box<E>

Trait implementation for boxed embedders.

fn embed_tokens(&self, text: &str) -> Result<MultiVectorEmbedding>

fn embed_tokens_batch( &self, texts: &[&str], ) -> Result<Vec<MultiVectorEmbedding>>

fn token_dimension(&self) -> usize

fn max_tokens(&self) -> usize

fn model_id(&self) -> &str

Implementors

impl MultiVectorEmbedder for MockMultiVectorEmbedder