[Background.] Empirical research in requirements engineering (RE) is a constantly evolving topic, with a growing number of publications. Several papers address this topic using literature reviews to provide a snapshot of its "current" state and evolution. However, these papers have never built on or updated earlier ones, resulting in overlap and redundancy. The underlying problem is the unavailability of data from earlier works. Researchers need technical infrastructures to conduct sustainable literature reviews. [Aims.] We examine the use of the Open Research Knowledge Graph (ORKG) as such an infrastructure to build and publish an initial Knowledge Graph of Empirical research in RE (KG-EmpiRE) whose data is openly available. Our long-term goal is to continuously maintain KG-EmpiRE with the research community to synthesize a comprehensive, up-to-date, and long-term available overview of the state and evolution of empirical research in RE. [Method.] We conduct a literature review using the ORKG to build and publish KG-EmpiRE which we evaluate against competency questions derived from a published vision of empirical research in software (requirements) engineering for 2020 - 2025. [Results.] From 570 papers of the IEEE International Requirements Engineering Conference (2000 - 2022), we extract and analyze data on the reported empirical research and answer 16 out of 77 competency questions. These answers show a positive development towards the vision, but also the need for future improvements. [Conclusions.] The ORKG is a ready-to-use and advanced infrastructure to organize data from literature reviews as knowledge graphs. The resulting knowledge graphs make the data openly available and maintainable by research communities, enabling sustainable literature reviews.

翻译：[背景.] 需求工程（RE）的实证研究是一个不断发展的主题，相关出版物数量日益增长。许多论文通过文献综述描绘该主题的"当前"状态与演变趋势，但这些研究从未基于或更新早期成果，导致内容重叠与冗余。其根本问题在于早期研究数据不可获取。研究者需要可持续开展文献综述的技术基础设施。[目标.] 我们探讨将开放研究知识图谱（ORKG）作为此类基础设施，构建并发布一个初始的需求工程实证研究知识图谱（KG-EmpiRE），其数据可公开获取。长期目标是与研究社区持续维护KG-EmpiRE，综合形成关于RE实证研究状态与演变的全面、最新且长期可用的概览。[方法.] 我们使用ORKG开展文献综述，构建并发布KG-EmpiRE，并根据一份已发布的2020-2025年软件（需求）工程实证研究愿景推导出的能力问题对其评估。[结果.] 从IEEE国际需求工程会议（2000-2022年）的570篇论文中，我们提取并分析了报告实证研究的相关数据，回答了77个能力问题中的16个。这些答案表明该领域已朝向愿景取得积极进展，但仍需未来改进。[结论.] ORKG是一种可即用且先进的基础设施，可支持将文献综述数据组织为知识图谱。由此生成的知识图谱使数据公开可用并可被研究社区维护，从而实现可持续的文献综述。