Comp4321 The Index May 14 2026

The anatomy of a top result.

query · us retriev book inform descript · doc № 009
title ×2.0 body match

Forward index · top stems on this page

us 6 retriev 5 book 3 inform 3 descript 3 main 2 topic 2 keyword 2 chapter 2 ratio 2 mean 2 relat 2 made 2 research 1

document length 97 body tokens  ·  max tf 6 (us)  ·  vocabulary 74 distinct stems  ·  title 1 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 stems0.5316
  2. cosine(query, title) × 2.0 title boost ×2.0 applied0.8121
  3. weighted subtotal cosBody + 2.0 × cosTitle1.3438
  4. × phrase multiplier stems not within 5-token window · ×1.0×1.0
  5. × pagerank multiplier 1 + 0.5 × normalized PR (0.000)×1.0001
  6. final score weighted × phrase × pagerank1.3440

Per-query-stem · how each term contributes

  1. us wid 0027 · df 286 body tf 6 title tf 0 idf 0.069
  2. retriev wid 0025 · df 7 body tf 5 title tf 0 idf 5.421
  3. book wid 0011 · df 19 body tf 3 title tf 1 idf 3.981
  4. inform wid 0024 · df 27 body tf 3 title tf 0 idf 3.474
  5. descript wid 0928 · df 4 body tf 3 title tf 0 idf 6.229

Outlinks (1)