R/exams 中可能的元信息

Question

我发现了非常有用的 R/exams 包，以及它非常完整的文档。

除非我弄错了，否则我没有找到提供可包含在 Rmd 问题末尾的元信息的详尽列表的地方。我对 moodle 导出上下文中的元信息特别感兴趣。例如，我知道可以定义一个部分或子部分，或者请求上传文档。但是所有其他的可能性是什么？

非常感谢！

Answer 1

Tag	Description
extype	Specification of the type of exercise (required): num for questions with a numeric answer, mchoice for questions with multiple-choice answers, schoice for questions with single-choice answers (i.e., multiple-choice with exactly one correct solution), string for questions with a text answer, or cloze (i.e., combinations of the above).
exname	Short name/description (to be used for printing within R).
extitle	Pretty longer title (for Moodle).
exsection	Section of the exercise (for Moodle, with slashes for subsections as in a URL).
exversion	Version of the exercise.
exsolution	Correct solution (required). It must contain a numeric solution for num, a string of zeros/ones for mchoice/schoice, or a character string of string. For cloze a combination of these can be specified, e.g., exsolution: 1.23|001|glm.
extol	Tolerance for num solutions or a vector of tolerances (expanded if necessary) for cloze solutions. If unspecified the tolerance is 0.
exclozetype	List of types for the elements of a cloze exercise, e.g., exclozetype: num|schoice|string for the example above.
exstringtype	Type(s) of answer format for string exercises. The default is string but can also be essay (text editor) and/or file (upload menu).
expoints	Points for (fully) correct solution. Default is 1.
exshuffle	Logical or numeric indicating if/how to shuffle schoice/mchoice answers.
exmaxchars	Maximum number of characters in string answers (for QTI).
exextra[]	Additional metainformation to be read and stored, e.g., for new custom interfaces. The default storage type is character, e.g., exextra[myinfo]: 1.23 yields a metainformation element myinfo of "1.23". The type can also be numeric or logical, e.g., exextra[myinfo,logical]: FALSE|FALSE|TRUE.

笔记：

• 你说得对，这不容易找到。如vignette("exams2", package = "exams") 的表 2 所示（也发表在统计软件杂志）。我计划在 2.4-0 版本发布到 CRAN 时写一篇关于它的博客文章。
• 上表还包括几个较新的标签，在期刊发表后添加。
• 在exextra 中，您可以包含任何您希望的自定义​​信息，例如，用于存储自定义exams2xyz() 界面或评估结果所需​​的元信息。
• 在exams2moodle() 中，我们支持几个特定于Moodle 的exextra 选项，即“论文”类型问题的一些详细格式。所有支持的选项都可以在essayreg 练习模板中找到。
• 此外，还可以通过exextra 选项从?exams2moodle 设置numwidth 和stringwidth 参数。请参阅fourfold2 练习模板以获取工作示例。

Answer 2

您可以在?read_metainfo 或documentation、read_exercise 中查看列表：

read_metainfo 返回一个包含以下元素的列表