9. The search engine according to claim 1 in which the semantic rule engine is arranged to capture at least some of the rules by recording edits made by rule generating users to documents stored in the database.
9. The search engine according to claim 1 in which the semantic rule engine is arranged to capture at least some of the rules by recording edits made by rule generating users to documents stored in the database. 10. The search engine according to claim 9 in which the semantic rule engine is arranged to capture conditions associated with edits made to provide a rule.