Abstract: Systems and methods are disclosed for retrieving on-line information by receiving a request for a document from an information system; parsing the request for a source identifier; searching for documents in a local search system in response to the parsed request; and providing one or more responsive documents to the request.

Abstract: A search system for enabling local searching via global searching includes a global search engine and a searchable global database storing information relating to web-pages on web-sites and base information relating to one or more web-sites, and a local search engine being accessible based on base information stored in the global database.

Abstract: A virtual data argument data, comprising at least one identifier each uniquely identifying one or more items of the virtual data, and at least one descriptor uniquely defining relationship between the item(s) identified by the indentifier(s).

Abstract: A method for categorising items being data entities stored in a computer system, the method comprising performing categorisation in such a manner that an item and a category are linked if a determined quantification of a relation between said item and said category fulfils a predefined criterion, the said method utilising a list of categories on which the categorisation is to be based, for each category comprised in the list of categorises at least one categorisation function for determining quantification for at least one relation between the category and an item, such as a number, a colour, and/or a text; the quantification of the relation(s) being determined by executing the categorisation function(s), for each item to be categorised, item data to be used for executing the categorisation function(s), the said method comprising, selecting a first set of categorisation functions and a first set of item data, (A) executing the categorisation function(s) comprised in the first set of categorisation functions o