users to ask unstructured questions and to present the results in order of relevance. Apart from that, a dual operation was adopted to increase the speed of the system. While searches themselves were tuned at the SQL (Structured Query Language) level, additional indexes on the RDBMS (relational database management system) tables were deployed. See also Home Office Geographic information system Crime mapping Artificial intelligence References External links HOLMES 2 Website Unisys Website NPIA Holmes Website An example for the use of HOLMES 2 in practice Crime & Investigation Network International High Technology Crime Investigation Association Legal Technology Journal Artificial Intelligence and Law Government databases in the United Kingdom Law enforcement in the United Kingdom Home Office (United Kingdom)