A semantic model, named Nanolinks, was compiled to describe nanosafety data. Using this model, different datasets of different bioassay types, specifically, cytotoxicity, gene expression, and physicochemical characterization can be represented using the same framework for interoperable use. The model captures three aspects of information, namely, metadata and provenance (Figure ), bioassay description and endpoint measurements (Figure ) with an extension for gene expression bioassays (Figure ), and nanomaterial characterization (Figure ). The full model visualization is available online . Furthermore, Table shows a summary of the ontologies and the selection of terms used to build the NanoLinks model.