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The main goal in the design of intelligent information processing systems is to provide automatic support for the processing of the large amount of documents, today's office workers are confronted with. Existing message filtering systems can provide this support only if the messages to be processed are at least semi-structured.The MAFIA System (MAil-FIlter-Agent) overcomes these limitations of existing message filtering systems by providing an automatic document classification component which recognizes the relevant concepts of weakly structured documents automatically and computes a semantic representation of the document. Using this semantic representation the user is able to specify rules for an effective and content-oriented information processing support.
Lutz et al. (1990) studied this question.