The HTML compat data is missing data for HTML global attributes.

MDN pages to migrate:

• Web/HTML/Global_attributes
• Web/HTML/Global_attributes/accesskey
• Web/HTML/Global_attributes/class
• Web/HTML/Global_attributes/contextmenu
• Web/HTML/Global_attributes/data-*
• Web/HTML/Global_attributes/dir
• Web/HTML/Global_attributes/dropzone
• Web/HTML/Global_attributes/hidden
• Web/HTML/Global_attributes/itemid
• Web/HTML/Global_attributes/itemref
• Web/HTML/Global_attributes/itemscope
• Web/HTML/Global_attributes/lang
• Web/HTML/Global_attributes/slot
• Web/HTML/Global_attributes/spellcheck
• Web/HTML/Global_attributes/style
• Web/HTML/Global_attributes/tabindex
• Web/HTML/Global_attributes/title
• Web/HTML/Global_attributes/translate

The data should be migrated into html/global_attributes.json .

• html.global_attributes.
  • class
  • dir
  • ...

For more information on how to help with this work, see https://developer.mozilla.org/en-US/docs/MDN/Contribute/Structures/Compatibility_tables