* Relevance Ranking * Introduction In relational algebra, the response to a query is always an unordered set of qualifying tuples. Keyword queries are not precise Rate each…

* Relevance Ranking * Introduction In relational algebra, the response to a query is always an unordered set of qualifying tuples. Keyword queries are not precise Rate each…

Web search engines Paolo Ferragina Dipartimento di Informatica Università di Pisa Two main difficulties The Web: Size: more than tens of billions of pages Language and encodings:…

Quality of a search engine Paolo Ferragina Dipartimento di Informatica Università di Pisa Reading 8 Is it good ? How fast does it index Number of documents/hour (Average…

Quality of a search engine Paolo Ferragina Dipartimento di Informatica Università di Pisa Reading 8 Is it good ? How fast does it index Number of documents/hour (Average…

Web search engines Paolo Ferragina Dipartimento di Informatica Università di Pisa Two main difficulties The Web: Size: more than tens of billions of pages Language and encodings:…