设计这些表时要记住一点：您需要支持关于作者的从属关系的查询。
Design these tables keeping in mind that you want to support queries about the affiliation of the authors.
许多时间表都包括一个开始和一个截止时间，任务所需时间和任务与任务之间的从属关系。
Most schedules involve a start and end date, and include tasks, task duration, and dependencies between tasks.
通过uri在authors表中查询作者，提取(现在和过去的)从属关系。
Look up the authors in the authors table by URI, and extract the affiliations, both present and past.
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