Abstract: In a method for structuring, in an ordered tree of predetermined depth P?, of data complying with predetermined criteria Fs and organized in a directed acyclic graph of depth P which comprises nodes and links between the nodes, the nodes and links stored by type in tables of a relational database which is queried by a query language from an application server connected to a user interface, the criteria Fs being determined on the nodes and/or the links, the method includes: creation of a “CACHE” table in the database; determination by the database of a set E; running of an iteration having an identifier id and/or properties; and transmission by the database to the application server of an end-of-process item of information with the number of nodes loaded into the “CACHE” table and of an identifier for access to the “CACHE” table.