> For the complete documentation index, see [llms.txt](https://emacs-lisp.ivory.cafe/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://emacs-lisp.ivory.cafe/fu-hao/9.4-fu-hao-shu-xing/9.4.2-biao-zhun-shu-xing.md).

# 9.4.2 标准符号属性

这里，我们列出了一些特殊的符号属性，这些符号属性为 Emacs 服务。在下表中，当我们说到“具名函数”时，是指这个函数的名字对应的符号对应的函数定义；对“具名变量”同理。

**:advertised-binding**\
  这个属性值指明该具名函数的按键绑定偏好，这个信息会显示在文档中。

**char-table-extra-slots**\
  当值为非nil时，指明了在具名字符表类型中的额外槽的数量。

**customized-face**\
**face-defface-spec**\
**saved-face**\
**theme-face**\
  这些属性被用来记录前端展示的标准、保存、定制和主题的规格。不要直接设置这些属性；它们被 defface 和一些相关的函数管理。

**customized-value**\
**saved-value**\
**standard-value**\
**theme-value**\
  这些属性被用来记录一个定制变量的标注、保存、定制但未保存和主题值。不要直接设置这些属性；它们被 defcustom 和一些相关的函数管理。


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