Horsch, M.T.M.T.HorschChiacchiera, S.S.ChiacchieraLeite Cavalcanti, W.W.Leite CavalcantiSchembera, B.B.Schembera2022-03-062022-03-062021https://publica.fraunhofer.de/handle/publica/26834210.1007/978-3-030-68597-3_2This chapter introduces metadata models as a semantic technology for knowledge representation to describe selected aspects of a research asset. The process of building a hierarchical metadata model is reenacted in this chapter and highlighted by the example of EngMeta. Moreover, an overview on data infrastructures is given, the general architecture and functions are disscussed, and multiple examples of data infrastructures in materials modelling are given.en620660671book article