Term Kind Topic What it is
Approximate Nearest Neighbour Index ANN concept Vector Databases An index that trades exactness for speed when finding similar vectors, making large-scale semantic search feasible.
Filtered Vector Search Predicate-Constrained ANN, Metadata Filtering in ANN pattern Vector Databases Combining a metadata predicate with approximate nearest-neighbour search - where the predicate's selectivity, not the corpus size, decides whether results are correct or latency collapses.