Representation

Learned Sparse Retrieval

Canonical ID https://id.searchplex.net/learned-sparse-retrieval/

Retrieval using sparse query and document representations whose feature activations or weights are learned from data.

Also called

Neural Sparse Retrieval

Scope

Learned sparse systems commonly retain compatibility with inverted-index-style retrieval while learning lexical or vocabulary-space representations. Expansion-like activations may occur, but the representation family is not itself the query-expansion task.

Observed terms

Sparse Neural Retrieval academic

Broader

Sparse Retrieval

Realized by

SPLADE

Not equivalent to

Learned Sparse Retrieval is not Query Expansion. Learned sparse retrieval is a representation family; query expansion is a task or transformation applied to a query.
Learned Sparse Retrieval is not SPLADE. SPLADE is one model family that realizes learned sparse retrieval, not the whole representation family.

Learn more

SPLADE

ID

Canonical ID
https://id.searchplex.net/learned-sparse-retrieval/
Scheme
Searchplex ID
Machine
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