Components are not pure dataframes but python classes which represent containers. For example, n.generators is a GeneratorContainer class or Generators class (an subclass of the ComponentContainer or Components) with various attributes like static for the static dataframe, dynamic for the timedependant dataframes, or even shortcuts, like n.generators.p which would directly return the time-dependent dispatch. These containers could have component specific front-end functions like add_ocgt which has all the technological data for OCGT power plants.

See discussion in #896