Today, literature skills are necessary. Engineering and other technical professions are not an exception from this requirement. Traditionally, technical reading and writing have been framed with a limited scope, containing documentation, specifications, standards, and related text types. Nowadays, however, the scope covers also other text types, including legal, policy, and related documents. Given this motivation, this paper evaluates the readability of 201 legislations and related policy documents in the European Union (EU). The digital single market (DSM) provides the context and five classical readability indices the methods. The empirical results indicate that (i) generally a Ph.D. level education is required to comprehend the DSM laws and policy documents. Although (ii) the results vary across the five indices used, (iii) readability has slightly improved over time.

中文翻译：

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评估欧盟数字单一市场上政策文件的可读性

今天，文学技能是必需的。工程和其他技术专业也不例外。传统上，技术阅读和写作的范围是有限的，其中包含文档，规范，标准和相关的文本类型。但是，如今，该范围还涵盖其他文本类型，包括法律，政策和相关文档。鉴于这种动机，本文评估了欧盟（EU）中201条法规和相关政策文件的可读性。数字单一市场（DSM）提供了上下文和五个经典可读性指标的方法。实证结果表明：（i）通常是博士学位。必须接受高水平的培训，以理解DSM法律和政策文件。尽管（ii）所使用的五个指标的结果有所不同，