Based on the master thesis from Andreas Martens supervised be me, we defined an abstract 7‐Layer‐Software‐Architecture. The idea behind this is to understand the mapping of possible components and libraries onto the landscape of software architecture. The 7‐Layer‐Software‐Architecture is also a kind of checklist for none‐functional issues like state propagation and data transformation. Each enterprise application (and so its components) can be divided logically into this 7 layers. Onto or between these layers you can find libraries like Hibernate (OR‐Mapper between Domain Data model and Abstract Data model). Depending on the IT architecture these layers getting mapped into one or more tiers.