Postings list

Structure of Postings List - Postings list consists of posting elements - Posting elements contain document identifier (DocID) - Posting elements contain frequency information (Term Frequency) - Posting elements contain position information - Additional metadata may include document titles, headings, or other relevant information Variants of Postings List - Inverted index: Form of postings list that points from terms to documents - Impact-ordered postings: Lists ordered by weight or impact of term in document - Positional postings lists: Enhanced postings lists with position information for phrase queries and proximity searches References - Büttcher, Stefan; Clarke, Charles L. A.; Cormack, Gordon V. (2016): 'Information retrieval: implementing and evaluating search engines' - First MIT Press paperbacked - Cambridge, Massachusetts London, England: The MIT Press - ISBN978-0-262-52887-0 - Retrieved from https://en.wikipedia.org/w/index.php?title=Postings_list&oldid=1189633289 Application of Postings Lists - Postings lists are used during search queries - IR system retrieves postings lists for each term in query - Postings lists help determine relevant documents - Frequency and positions of terms are considered - Structure of postings lists can vary based on application Categories - Data structures - Information retrieval