The IUPAC Gold Book: A Compendium of Chemical Terminology

The IUPAC Compendium of Chemical Terminology (the "Gold Book") is an aggregation of the formally defined terms in the International Union of Pure and Applied Chemistry's Recommendations published in the journal of Pure and Applied Chemistry.  The talk highlights the status of the Gold Book and the current major update, machine access to the definitions via an API, and the inclusion of these terms in domain ontologies.