Method for automatically indexing documents

A method for retrieving based on a search term together with its corresponding meaning from a set of base documents those documents which contain the search term and in which the certain search term has the certain meaning to enable the building of an index on the retrieved documents. The method includes searching for those base documents among the set of base documents which contain the certain search term and evaluating the found base documents as to whether the search term contained in the found base documents, respectively, has a certain meaning. Evaluation includes generating a text document to represent elements surrounding the search term and their corresponding absolute or relative position with respect to the search term; inputting the text document into a trainable classifying apparatus; classifying the inputted text document to judge whether the search term has the inputted meaning.