Module preprocess 

Query preprocessing strategies for improved retrieval.

This module provides preprocessing techniques to enhance query effectiveness:

• HyDE (Hypothetical Document Embeddings): Generate hypothetical answers for better matching
• Multi-query expansion: Expand a single query into multiple related queries

Structs

AnthropicHypotheticalGenerator

Anthropic-backed HyDE generator using Claude API.

ChainedPreprocessor

Chained preprocessor that applies multiple preprocessors in sequence.

HydePreprocessor

HyDE (Hypothetical Document Embeddings) preprocessor.

KeywordExpander

Keyword-based query expander.

MockHypotheticalGenerator

Mock HyDE generator for testing that creates a simple hypothetical answer.

MultiQueryPreprocessor

Multi-query expansion preprocessor.

PassthroughPreprocessor

No-op preprocessor that returns the query unchanged.

QueryAnalysis

Analysis result for a query.

QueryAnalyzer

Query analyzer that extracts structured information from queries.

SynonymExpander

Synonym-based query expander.

Enums

QueryIntent

Detected intent of a query.

Traits

HypotheticalGenerator

Trait for generating hypothetical documents from queries.

QueryExpander

Trait for expanding queries into multiple related queries.

QueryPreprocessor

A query preprocessor that transforms or expands queries before retrieval.