| Recall is the term used to describe a search engines ability to return all relevant documents. For example if a query such as "yellow curtains" is entered into the search engine and there are 10 documents containing the words yet the search engine returns only 6 of them the recall of that search engine will be 0.6 or 60%. However if a search engine only has 4 documents with these words and all 4 are recalled the score will be 1 or 100% as all the documents were returned. |
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