The International Conference on Conceptual Modeling celebrated 40 years of existence at its 38th edition held in Salvador, Brazil, on 4–7 November 2019. As one of the most traditional and well-known conferences in the database area, it has its origins on the Entity-Relationship Model proposed by Peter P. Chen in 1975. To celebrate such an accomplishment, this article goes over the ER history from distinct perspectives. Overall, we investigate the complete ER collaboration network built on bibliographic data collected from DBLP, comprising its 38 editions held from 1979 to 2019. We analyze several aspects regarding the evolution of its network metrics, such as degree, clustering coefficient and average shortest path, over the four decades. In particular, we analyze the role of the most engaged ER authors, the number of distinct authors, institutions and published papers, and the evolution of some of the most frequent terms presented in the titles of its papers, as well as the influence and impact of the prominent ER authors.

国际概念建模会议于2019年11月4日至7日在巴西萨尔瓦多举行的第38届会议上庆祝成立40周年。它是数据库领域最传统，最著名的会议之一，其起源于实体关系模型是由Peter P. Chen在1975年提出的。为庆祝这一成就，本文从不同的角度介绍了ER历史。总体而言，我们调查了一个完整的ER协作网络，该网络基于从DBLP收集的书目数据构建而成，包括从1979年到2019年举行的38个版本。我们分析了有关其网络指标演变的几个方面，例如度，聚类系数和平均最短路径，在四个十年中。特别是，我们分析了参与度最高的ER作者，不同作者的数量，