“…This vocabulary is rather generic, and to get a collection of more specific terms, the Valerie vocabulary was developed by WUR in the Ask-Valerie project (http://www.foodvoc.org/page/Valerie-9, about 10k terms).Until now, the construction of controlled vocabularies is a manual process in which a number of domain experts collectively set a shared target, collect and organize terms, and express them in the SKOS format.See for example https://boxesandarrows.com/creating-a-controlled-vocabulary/ for a description of this process. There are several tools for constructing SKOS-based vocabularies, such as Protégé (https://protege.stanford.edu/), TopBraid (https://www.topquadrant.com/resources/skos-xl-taxonomies-intopbraid-edg), Swoop (http://www.mindswap.org/2004/SWOOP/), VocBench (http://vocbench.uniroma2.it), Semantic Turkey (http://semanticturkey.uniroma2.it/), PoolParty, (http://www.poolparty.biz/), TemaTres, (http://www.vocabularyserver.com/)[1,2]. However, these tools require some technical skills.…”