6. Results display

Of course, all the systems described in this article are completely invisible to Internet users. They only see the tip of the iceberg:

• the query engine or front-end interface (search form) offered to users. Several query levels (simple or advanced search interface) are generally offered, with simple search being the default;

• For each question, a query is generated in the index and a dynamic web page (SERP – search engine results page) displays the results, generally in the form of lists of 10 results by default (figure 8 ).