A new version of the guidelines on how to manage the multilingual thesaurus developed by the Food and Agriculture Organization of the United Nations is now available online. The document contains resources for translations and maintenance of the thesaurus as well as instructions for the addition of new terms and the managing of relationships using both the maintenance and refinement tool. It also includes highlights on the efforts to improve the structure and semantics of AGROVOC such as the evolution from the thesaurus to what is called "Concept Server"(CS), an ontology which makes distinction between concepts and the terms used to represent those concepts.