Ten years ago, the Mathematics Subject Classification MSC 2010 was released, and a corresponding machine-readable Linked Open Data collection was published using the Simple Knowledge Organization System (SKOS). Now, the new MSC 2020 is out. This paper recaps the last ten years of working on machine-readable MSC data and presents the new machine-readable MSC 2020. We describe the processing required to convert the version of record, as agreed by the editors of zbMATH and Mathematical Reviews, into the Linked Open Data form we call MSC2020-SKOS. The new form includes explicit marking of the changes from 2010 to 2020, some translations of English code descriptions into Chinese, Italian, and Russian, and extra material relating MSC to other mathematics classification efforts. We also outline future potential uses for MSC2020-SKOS in semantic indexing and sketch its embedding in a larger vision of scientific research data.

中文翻译：

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10 年后：数学学科分类和关联开放数据

十年前，发布了数学学科分类 MSC 2010，并使用简单知识组织系统 (SKOS) 发布了相应的机器可读链接开放数据集。现在，新的 MSC 2020 已经推出。本文回顾了过去十年对机器可读 MSC 数据的研究，并介绍了新的机器可读 MSC 2020。我们描述了将 zbMATH 和 Mathematical Reviews 的编辑同意的记录版本转换为链接开放数据表格我们称为 MSC2020-SKOS。新表格包括对 2010 年至 2020 年变化的明确标记，将一些英文代码描述翻译成中文、意大利语和俄语，以及将 MSC 与其他数学分类工作相关的额外材料。