To be as scientifically precise and concise as possible, many IUPAC experts have thoroughly discussed and worked on the wording of the definitions provided in the Gold Book. In many cases, it would therefore not be necessary or even reasonable to paraphrase when mapping them into an ontology context. Especially, if they are already using an Aristotelian format, in which the Genus can be mapped to an existing ontology term directly without having to relabel it. In such cases, there is the need to ensure that the source itself as well as the license information is referenced properly using appropriate annotations. The following annotation predicates from the DCMI Metadata Terms vocabulary and their allowed values are thus encouraged: