Comp4321 The Index May 14 2026

The anatomy of a top result.

query · wild lost search titl west · doc № 007
body match

Forward index · top stems on this page

new 3 bbc 2 rare 1 mp 1 urg 1 bt 1 goonhilli 1 commit 1 west 1 ham 1 blackburn 1 bird 1 back 1 project 1

document length 19 body tokens  ·  max tf 3 (new)  ·  vocabulary 16 distinct stems  ·  title 2 stems

Score breakdown

Re-derived from the same tf·idf cosine values, boost factors, and PageRank multipliers the live ranker just used. weighted = body + title × 2.0 · final = weighted × phrase × pagerank.

  1. cosine(query, body) tf·idf body · 5 resolved stems0.0530
  2. cosine(query, title) × 2.0 no title overlap (×2.0 unused)0.0000
  3. weighted subtotal cosBody + 2.0 × cosTitle0.0530
  4. × phrase multiplier stems not within 5-token window · ×1.0×1.0
  5. × pagerank multiplier 1 + 0.5 × normalized PR (0.000)×1.0002
  6. final score weighted × phrase × pagerank0.0530

Per-query-stem · how each term contributes

  1. wild wid 0359 · df 9 body tf 0 title tf 0 idf 5.059
  2. lost wid 0199 · df 25 body tf 0 title tf 0 idf 3.585
  3. search wid 0153 · df 147 body tf 0 title tf 0 idf 1.029
  4. titl wid 1103 · df 288 body tf 0 title tf 0 idf 0.059
  5. west wid 0902 · df 32 body tf 1 title tf 0 idf 3.229

Outlinks (4)