Comp4321 The Index May 14 2026

The anatomy of a top result.

query · new back main bbc cnn · doc № 107
body match

Forward index · top stems on this page

user 10 imdb 10 space 8 station 8 rate 8 tv 6 insid 6 detail 6 movi 5 titl 5 dvdvhscdall 5 comment 5 board 4 quot 4

document length 394 body tokens  ·  max tf 10 (user)  ·  vocabulary 253 distinct stems  ·  title 3 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 stems0.0021
  2. cosine(query, title) × 2.0 no title overlap (×2.0 unused)0.0000
  3. weighted subtotal cosBody + 2.0 × cosTitle0.0021
  4. × phrase multiplier stems not within 5-token window · ×1.0×1.0
  5. × pagerank multiplier PageRank not computed for this page · ×1.0×1.0000
  6. final score weighted × phrase × pagerank0.0021

Per-query-stem · how each term contributes

  1. new wid 0010 · df 292 body tf 2 title tf 0 idf 0.039
  2. back wid 0016 · df 297 body tf 1 title tf 0 idf 0.014
  3. main wid 0017 · df 157 body tf 2 title tf 0 idf 0.934
  4. bbc wid 0018 · df 4 body tf 0 title tf 0 idf 6.229
  5. cnn wid 0019 · df 2 body tf 0 title tf 0 idf 7.229

Outlinks (1)