The Temporal Interval Logic with Compositional Operators (TILCO) has been especially designed for the specification and validation of real-time systems. TILCO extends the classical temporal logics based on the operators eventually, and henceforth by using time intervals in order to allow the specification of both qualitative and quantitative temporal relationships. The use of time intervals also supports an abstract and synthetic style for specifying real-time systems. The validation of TILCO specifications are supported by means of property proving; direct execution of specifications and model-checking of system histories are also possible. Therefore, TILCO model can be considered as a dual approach. This paper describes TILCO and shows with an example its application for the specification and validation of real-time systems. Highlights about the TILCO axiomatization and the tools available for proving properties of specifications and for specifications execution are given.