The Excellence
Directory Platform Template

Elasticsearch and Lucene's implementation of RaBitQ algorithm for 1-bit vector quantization, renamed as BBQ. Provides 32x compression with asymptotically optimal error bounds, enabling efficient vector search at massive scale with minimal accuracy loss.

Elasticsearch's learned sparse encoding model (ELSER) that combines the efficiency of traditional search with semantic understanding. Uses neural methods to expand documents and queries with related terms while maintaining sparse representations for efficient retrieval.