  Before Rosetta, the space missions Giotto and Stardust shaped our view on
cometary dust, supported by plentiful data from Earth based observations and
interplanetary dust particles collected in the Earth's atmosphere. The Rosetta
mission at comet 67P/Churyumov-Gerasimenko was equipped with a multitude of
instruments designed to study cometary dust. While an abundant amount of data
was presented in several individual papers, many focused on a dedicated
measurement or topic. Different instruments, methods, and data sources provide
different measurement parameters and potentially introduce different biases.
This can be an advantage if the complementary aspect of such a complex data set
can be exploited. However, it also poses a challenge in the comparison of
results in the first place. The aim of this work therefore is to summarise dust
results from Rosetta and before. We establish a simple classification as a
common framework for inter-comparison. This classification is based on a dust
particle's structure, porosity, and strength as well as its size. Depending on
the instrumentation, these are not direct measurement parameters but we chose
them as they were the most reliable to derive our model. The proposed
classification already proved helpful in the Rosetta dust community and we
propose to take it into consideration also beyond. In this manner we hope to
better identify synergies between different instruments and methods in the
future.
