Inverted index is an index structure for storing word location information from a set of documents subject to full-text search. Inverted index - Wikipedia
This page is auto-translated from /nishio/転置インデックス using DeepL. If you looks something interesting but the auto-translated English is not good enough to understand it, feel free to let me know at @nishio_en. I'm very happy to spread my thought to non-Japanese readers.