This paper has a dual character, combining a philosophical ontological exploration with a conceptual modeling approach in systems and software engineering. Such duality is already practiced in software engineering, in which the current dominant modeling thesis is object orientation. This work embraces an anti-thesis that centers solely on the process rather than emphasizing the object. The approach is called occurrence-only modeling, in which an occurrence means an event or process where a process is defined as an orchestrated net of events that form a semantical whole. In contrast to object orientation, in this occurrence-only modeling objects are nothing more than long events. We apply this paradigm to (1) a UML/BPMN inventory system in simulation engineering and (2) an event-based system that represents medical occurrences that occur on a timeline. The aim of such a venture is to enhance the field of conceptual modeling by adding yet a new alternative methodology and clarifying differences among approaches. Conceptual modeling s importance has been recognized in many research areas. An active research community in simulation engineering demonstrates the growing interest in conceptual modeling. In the clinical domains, temporal information elucidates the occurrence of medical events (e.g., visits, laboratory tests). These applications give an opportunity to propose a new approach that includes (a) a Stoic ontology that has two types of being, existence and subsistence; (b) Thinging machines that limit activities to five generic actions; and (c) Lupascian logic, which handles negative events. With such a study, we aim to substantiate the assertion that the occurrence only approach is a genuine philosophical base for conceptual modeling. The results in this paper seem to support such a claim.

翻译：本文具有双重性质，融合了哲学本体论探索与系统和软件工程中的概念建模方法。这种双重性在软件工程中已有实践，其中当前主流的建模论题是面向对象。本研究采纳了一种反题，该反题完全聚焦于过程而非强调对象。该方法称为仅发生建模，其中“发生”意指一个事件或过程，而过程被定义为构成语义整体的编排事件网络。与面向对象相反，在这种仅发生建模中，对象不过是长时事件。我们将这一范式应用于：(1) 模拟工程中的UML/BPMN库存系统，以及(2) 表示时间线上医学事件的基于事件的系统。此类尝试的目标是通过增加一种新的替代方法论并澄清不同方法间的差异，来推进概念建模领域。概念建模的重要性已在多个研究领域得到认可。模拟工程中活跃的研究社区表明了对概念建模日益增长的兴趣。在临床领域，时间信息阐明了医疗事件的发生（例如，就诊、实验室检查）。这些应用为提出新方法提供了机会，该方法包括：(a) 斯多葛本体论，该本体论具有两种存在类型——存在与实存；(b) 限制活动于五种通用行为的“物化机器”；以及(c) 处理负事件的卢帕西逻辑。通过这项研究，我们旨在证实以下论断：仅发生方法是概念建模的真正的哲学基础。本文结果似乎支持了这一主张。