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The portion of relevant documents that were retrieved when compared to all relevant documents.
SEO Book - Cite This Source - This Definition
- Related to precision, this is the degree in which a search engine returns all the matching documents in a collection. There may be 100 matching documents, but a search engine may only find 80 of them. It would then list these 80 and have a recall of 80%.
Search Engine Watch - Cite This Source - This Definition
- IDF, Multi Dimensional Scaling, Precision, Singular Value Decomposition, Term Frequency, Term Vector Database