When using imports and groups to model large hierarchical systems, it is a common pattern to have groups around the entire specification:
group factory: group machine1: group part1: automaton sensor1: ... end automaton actuator1: ... end end end end
The groups around the entire specification lead to additional indentation. As this is a common pattern, the CIF language provides namespaces to reduce the impact of large numbers of top level groups:
namespace factory.machine1.part1; automaton sensor1: ... end automaton actuator1: ... end
factory.machine1.part1 namespace has exactly the same effect as the original three groups. Both specifications can thus be considered identical.