elasticsearch-js/docs/reference/api/KnnRetriever.md

Interface KnnRetriever

Name	Type	Description
field	string	The name of the vector field to search against.
k	integer	Number of nearest neighbors to return as top hits.
num_candidates	integer	Number of nearest neighbor candidates to consider per shard.
query_vector_builder	QueryVectorBuilder	Defines a model to build a query vector.
query_vector	QueryVector	Query vector. Must have the same number of dimensions as the vector field you are searching against. You must provide a query_vector_builder or query_vector, but not both.
rescore_vector	RescoreVector	Apply oversampling and rescoring to quantized vectors
similarity	float	The minimum similarity required for a document to be considered a match.