A computer system and computer implemented method for applying tax legislation

摘要

The present invention relates to a computer system comprising:- means (104; 304, 350, 304') for receiving a request (118; 318) for performing a tax calculation, the request carrying a first mark-up language document (108) containing transaction data,- means (126, 128) for performing the tax calculation,- means (104; 304, 304') for generating a response (144; 344'), the response carrying the first mark-up language document and a result of the tax calculation- means (350, 352; 652) for forwarding the request to a replacement system (304', 336'), if the means for performing the tax calculation and/or the means for generating the response are unavailable, the means for forwarding being adapted to read a link to the replacement system from a storage component (660), the replacement system being a replacement web service, and- means (652, 658) for selecting the replacement web service from a plurality of web services obtained in response to a predefined universal description discovery integration (UDDI) query (655).