  The Virtual Materials Marketplace (VIMMP) project, which develops an open
platform for providing and accessing services related to materials modelling,
is presented with a focus on its ontology development and data technology
aspects. Within VIMMP, a system of marketplace-level ontologies is developed to
characterize services, models, and interactions between users; the European
Materials and Modelling Ontology (EMMO) is employed as a top-level ontology.
The ontologies are used to annotate data that are stored in the ZONTAL Space
component of VIMMP and to support the ingest and retrieval of data and metadata
at the VIMMP marketplace frontend.
