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    • Current queries
      • images
      • Query structure
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      • Changelog
      • Collecting data
      • Query design
      • Query design
      • wellcomecollection.org query development index
      • Reporting and metrics
      • Work IDs crib sheet
      • Analysis
        • Less than 3-word searches
        • Subsequent searches
        • Searches with 3 words or more
      • Hypotheses
        • Behaviours
        • Concepts, subject, and another field
        • Concepts, subjects with other field
        • Concepts, subjects
        • Contributor with other field
        • Contributors
        • Further research and design considerations
        • Genre with other field
        • Genres
        • Mood
        • Phrases
        • Reference number with other field
        • Reference numbers
        • Search scenarios
        • Synonymous names and subjects
        • Title with other field
        • Titles
      • Relevance tests
        • Test 1 - Explicit feedback
        • Test 2 - Implicit feedback
        • Test 3 - Adding notes
        • Test 4 - AND or OR
        • Test 5 - Scoring Tiers
        • Test 6 - English tokeniser and Contributors
        • Test 7 - BoolBoosted vs ConstScore
        • Test 8 - BoolBoosted vs PhaserBeam
    • Rank
      • Rank cluster
      • Developing with rank
      • Testing
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Search

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Last updated 9 months ago

These docs describe the development of our search engine and the systems we've used to test it.

The story so far

We began with a to measuring relevance, running candidate queries against each other in AB tests, and taking incremental steps based on some illustrative metrics. After a few months of development, we found that this approach was insufficient to drive the development of new features safely or reliably. Most of this documentation is now outdated as a result.

Instead, we started developing , a system which uses known examples of tricky search-term / document pairs to constrain the query. Rank is the system we use to develop queries and mappings today.

Current queries

You can read an explanation of the current queries' structure .

data-informed approach
rank
here