Tag: elasticsearch
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BM25 Ranking
Best Match 25 — the industry-standard relevance ranking algorithm used by Elasticsearch, Lucene, and SQLite FTS5, refining TF-IDF with better document length normalisation and a term frequency saturation parameter.
2mo ago
search intermediate
Elasticsearch Fundamentals PHP 7.0+
A distributed search and analytics engine built on Lucene — storing documents as JSON, indexing them automatically, and providing a REST API for full-text search, aggregations, and real-time analytics.
2mo ago
search intermediate
Inverted Index
A data structure that maps each unique word to the list of documents containing it — the foundation of all full-text search engines, enabling fast lookup of documents matching a query term.
2mo ago
search intermediate
Typeahead & Autocomplete PHP 7.0+
Search suggestions shown as the user types — requiring prefix matching, typo tolerance, and sub-100ms response times to feel native, implemented via dedicated index structures or edge completion APIs.
2mo ago
search intermediate
Search Relevance — TF-IDF & BM25
Ranking algorithms that score documents by how relevant they are to a query — TF-IDF and BM25 balance term frequency against document length to surface the best matches.
2mo ago
search advanced
Elasticsearch PHP 5.0+ A distributed full-text search engine — inverted indexes enable sub-second keyword and relevance-ranked search across millions of documents.
2mo ago
search advanced
Faceted Search & Aggregations Dynamically computed counts for filter categories based on current results — the 'Brand (42) | Price $0-50 (18)' sidebar that refines search results.
2mo ago
search intermediate