1. A method of assisting with the construction of a tree of clusters of electronic documents, which documents are defined by predetermined attributes, wherein the method comprises, for a given cluster of documents and a given level of the tree, the steps of: a) obtaining and storing constraints (E 300 ) defined between at least two documents of said cluster; b) constructing subclusters (E 310 ) as a function of the constraints obtained and the attributes of the documents of said cluster; c) creating a tree level (E 320 ) corresponding to the subclusters created; and d) selecting a constructed subcluster (E 340 ) and iterating the steps a), b), c), and d) for the selected subcluster until said tree is obtained.