Glossary: System Design Beyond the Basics in C++
IDF (inverse document frequency)
Also written: idf
The part of BM25 that is large when few documents contain a word and near zero when about half do. It is why 'espresso' scores about 0.
Glossary: System Design Beyond the Basics in C++
Also written: idf
The part of BM25 that is large when few documents contain a word and near zero when about half do. It is why 'espresso' scores about 0.