Basic calculation principles for indicators
                                        Here, the following indicator calculation principles are introduced.
- Projection onto the analysis horizon (AH)
 - Aggregation along the line hierarchy (Aggregation of indicators on trip section level to indicators of a higher level)
 - Temporal cut (Calculation of indicators for analysis time intervals)
 - Spatial cut ("Territory cut")
 - Impact caused by couplings
 - Projection of additional attributes
 

