Method for automatically indexing documents

Methods and Systems for automatically indexing a set of base documents. Data defining all elements respectively contained within the base documents is indexed. The elements comprise an element to be checked and surrounding elements that surround the element to be checked. The received data is evaluated as to whether the element to be checked has the corresponding meaning, wherein training has been performed based on a training sample generated for base documents in which the element to be checked is surrounded by the surrounding elements and has the corresponding meaning. For those base documents where elements have been found to have the corresponding meaning, building an index indexing the base documents, the index comprising the elements having the corresponding meaning with a corresponding reference to the document in which each element is contained.