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search: synonym / query expansion + 9 tests
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A synonym map [(Term,[Term])] expands a query term to itself + synonyms
(expandTerm); synDocs unions and synRankTfIdf ranks the expanded set. 214/214.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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giles
2026-06-06 23:27:03 +00:00
parent cf4e613e43
commit cfa68c3db3
7 changed files with 80 additions and 7 deletions
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@@ -119,9 +119,13 @@ lib/search/index.sx lib/search/eval.sx
- [x] stemming (suffix stripping) — `stem`, `stemText`, `stemTokens`, `indexStemmed`
— 18 tests
- [x] proximity / NEAR — `nearDocs k t1 t2` (unordered, within k positions) — 9 tests
- [x] synonym / query expansion — `expandTerm`, `synDocs`, `synRankTfIdf` — 9 tests
## Progress log
- **Extension: synonyms/query expansion (214/214 total).** A synonym map
`[(Term,[Term])]` expands a query term to itself + synonyms (`expandTerm`); `synDocs`
unions, `synRankTfIdf` ranks the expanded set. 9 tests.
- **Extension: proximity/NEAR (205/205 total).** `nearDocs k t1 t2 idx` returns docs
where both terms occur within k positions (unordered), candidates = posting
intersection, filtered on the positional postings. 9 tests.