In the area of monitoring communication networks, GEDSystem is a tool for supporting the development of programs driven to the management of domains that may show up when networks are monitored by SNMP. This tool is supported by an automatic modeling of data and events and automates the grouping of MIB objects from several SNMP agents, producing data structures that represent Domains and Events. The structures are automatically transformed into Tables and Views of a relational database. The views implement the perception mechanisms of the Events defined in the tool. The GEDSystem also provides a Monitoring Agent that automatically recognizes, collects and stores information about the Domains.