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  3. Find grey literature and policy
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Find grey literature and policy

Search for grey literature and policy to support research
  • Using Overton’s Advanced Search

    Learn how our advanced search query builder works and which search strategies you can use in Overton Index. Our advanced...
  • Searching for similar policy documents

    Find similar policy documents using semantic search
  • Search using Topics

    Overton currently has over 650,000 topics connected to policy documents. Topics can be useful when trying to locate policy documents...
  • How does Overton calculate relevance?

    Overton’s full-text search function is powered by Elasticsearch. The default relevance scoring algorithm used by Elasticsearch is BM25, which is a version...
  • Summary reports for policy documents

    When you run a search in the ‘Search Policy Documents and Grey Literature’ search, you can view the results in...
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