9. A method according to claim 1 , wherein the service system is adapted to handle query messages relating to documents from more than one publisher by accessing further service systems maintained by individual publishers.
1. A method of finding locally-relevant information in a physical or electronic document already possessed by a user, the method comprising the steps of: (a) sending a query message from a mobile entity associated with the user via a mobile radio infrastructure to a service system, the query message identifying the document to the system; (b) providing location data regarding the location of the mobile entity to the service system; (c) under the control of the service system, obtaining a document reference indicating where, in the document, information can be found that is relevant to the locality of the mobile entity as indicated by said location data; (d) returning the document reference to the mobile entity.