Eurocode, BS EN 1990 'Eurocode: Basis of structural design' is the head document in the Eurocode suite. Known as Eurocode 0, it describes:
the basis and general principles for structural safety, serviceability design and durability. It covers the verification of buildings and civil engineering works including geotechnical aspects,
the principles and requirements for safety and serviceability of structures and
guidelines for related aspects of structural reliability in all circumstances in which a structure is required to give adequate performance in fire and seismic events.
Consisting of only one part, Eurocode 0 is the basis upon which all the other Eurocodes (1 to 9) operate for the design of structures.
Extract from How to Design Concrete Structures using Eurocode 2 (page 2, figure 1)