Term space representation of AND and OR query. " data-image-caption="" data-large-file="https://irthoughts.wordpress.com/wp-content/uploads/2021/09/screenshot-2021-09-06-at-10-34-24-the-extended-boolean-model-term-vector-6-pdf-1.png?w=502"> The Extended Boolean Model for Information Retrieval. This is an IR tutorial I wrote circa 2006 ( http://www.minerazzi.com/tutorials/term-vector-6.pdf ). It may be useful to those interested in learning its applicability and implementation. The model was developed by Edward Alan Fox in his 1983 PhD thesis: Extending the Boolean and Vector Space Models of Information Retrieval with p-norm Queries and Multiple Concept Types. Ph.D. Dissertation, Cornell University. Retrieved from https://catalog.hathitrust.org/Record/009232562 The tutorial covers the advantages, limitations, and drawbacks of the model. By varying the p-norm, from p = 1 to p = infinity, its ranking behavior changes from that of a vector space-like to that of a strict Boolean-like. I know, I know.…