21. A method for network management implemented in or in association with a network node, comprising the steps of: modelling network domain and behaviour models using formal ontologies comprising inference capabilities to provide a formal ontology model domain and behavior description; adding, in an annotating step, semantic information to the formal domain and behaviour ontology model; and elaborating an algorithm adapted to generate and update a probabilistic causal graph structure using said formal ontology model and said inference capabilities.
21. A method for network management implemented in or in association with a network node, comprising the steps of: modelling network domain and behaviour models using formal ontologies comprising inference capabilities to provide a formal ontology model domain and behavior description; adding, in an annotating step, semantic information to the formal domain and behaviour ontology model; and elaborating an algorithm adapted to generate and update a probabilistic causal graph structure using said formal ontology model and said inference capabilities. 30. A method according to claim 21 , wherein the method used to manage a network node.