Business process modelling languages typically enable the representation of business process models by employing (graphical) symbols. These symbols can vary depending upon the verbosity of the language, the modelling paradigm, the focus of the language, and so on. To make explicit the different constructs and rules employed by a specific language, as well as bridge the gap across different languages, meta-models have been proposed in literature. These meta-models are a crucial source of knowledge on what state-of-the-art literature considers relevant to describe business processes. The goal of this work is to provide an extensive systematic literature review (SLR) of business process meta-models. This SLR aims at answering research questions concerning: (i) the kind of meta-models proposed in literature; (ii) the recurring constructs they contain; (iii) their purposes; and (iv) their evaluations.

中文翻译：

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流程模型由什么组成？BPM 中元模型的系统文献综述

业务流程建模语言通常能够通过使用（图形）符号来表示业务流程模型。这些符号可以根据语言的详细程度、建模范式、语言的重点等而有所不同。为了明确特定语言采用的不同结构和规则，并弥合不同语言之间的差距，文献中提出了元模型。这些元模型是了解最先进文献认为与描述业务流程相关的知识的重要来源。这项工作的目标是提供业务流程元模型的广泛系统文献综述 (SLR)。该 SLR 旨在回答有关以下方面的研究问题：(i) 文献中提出的元模型类型；(ii) 它们包含的重复结构；(iii) 他们的目的；(iv) 他们的评价。