Comp4321 The Index May 14 2026

The anatomy of a top result.

query · new bbc rare mp urg · doc № 007
phrase ×3.0 title ×2.0 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 stems0.5610
  2. cosine(query, title) × 2.0 title boost ×2.0 applied0.9954
  3. weighted subtotal cosBody + 2.0 × cosTitle1.5565
  4. × phrase multiplier ≥2 stems within 5-token window×3.0
  5. × pagerank multiplier 1 + 0.5 × normalized PR (0.000)×1.0002
  6. final score weighted × phrase × pagerank4.6701

Per-query-stem · how each term contributes

  1. new wid 0010 · df 292 body tf 3 title tf 1 idf 0.039
  2. bbc wid 0018 · df 4 body tf 2 title tf 1 idf 6.229
  3. rare wid 0896 · df 5 body tf 1 title tf 0 idf 5.907
  4. mp wid 0897 · df 4 body tf 1 title tf 0 idf 6.229
  5. urg wid 0898 · df 3 body tf 1 title tf 0 idf 6.644

Outlinks (4)