eNanoMapper, BAO and NPO, among others. The adoption of semantic modeling and reusing relevant ontologies by both systems allowed for seamless integration, highlighting a great example of technical and semantic interoperability that can be achieved with the approach described in this work. An example of a SPARQL query to list available characteristics for a specific nanomaterial along with its values and units is presented in Listing 3. h a s q u a l i t y ? q u a l i t y .