May 23, 2013 Leave a comment
State-of-the-Art Mobile Search is a series exploring how to implement advanced mobile search.
As explained in prior installments in this series, advanced search relies on term frequency and inverse document frequency. Together, those two factors reflect the importance of a term in a given document with respect to the rest of the corpus, which tells the search engine how relevant a document is given a single search term.
To optimize search execution, term frequency and independent document frequency are calculated for each term and document in the corpus before executing search queries. Then, when a search query is issued, the search engine quickly scores each document for the given search terms. Read more of this post