Prospective studies require discussing and collaborating with the stakeholders to create scenarios of the possible evolution of the studied value-chain. However, stakeholders don't always use the same words when referring to one idea. Constructing an ontology and homogenizing vocabularies is thus crucial to identify key variables which serve in the construction of the needed scenarios. Nevertheless, it is a very complex and timeconsuming task. In this paper we present the method we used to manually build ontologies adapted to the needs of two complementary system-analysis models (namely the "Godet" and the "MyChoice" models), starting from interviews of the agri-food system's stakeholders.

翻译：未来研究需要与利益攸关方讨论和合作,以创造研究过的价值链可能演变的情景。 但是,利益攸关方在提到一个理念时并不总是使用相同的词语。 因此,建立本体学和统一化词汇对于确定有助于构建所需情景的关键变量至关重要。 然而,这是一项非常复杂和耗时的任务。 在本文件中,我们介绍了我们用于手工构建适应两个互补系统分析模型(即“Godet”和“MyChoice”模式)需要的基于数据的方法,这些模型是从对农业食品系统利益攸关方的访谈开始的。