Just updated my SharePoint reference document Excel (references: here and here) with the default content placeholders.
It now contains:
- Fields: all the built-in SharePoint field types;
- Content types;
- List templates;
- Site templates;
- SPDataSource returned fields;
- List fields;
- Document library fields;
- Search content classes;
- Content placeholders in default master pages.
If you have any corrections or if I missed something, please let me know!