Org uses various syntactic elements: TODO keywords, tags, property names, keywords, blocks, etc. In this manual we use the following conventions:
TODO keywords are written with all capitals, even if they are user-defined.
Tags are case-sensitive. User-defined tags are usually written in lowercase; built-in tags with special meaning are written as they should appear in the document, usually with all capitals.
User-defined properties are capitalized; built-in properties with special meaning are written with all capitals.
Keywords and blocks are written in uppercase to enhance their readability, but you can use lowercase in your Org files.
The manual lists both the keys and the corresponding commands for
accessing functionality. Org mode often uses the same key for
different functions, depending on context. The command that is bound
to such keys has a generic name, like org-metaright. In the manual,
we will, wherever possible, give the function that is internally
called by the generic command. For example, in the chapter on
document structure, M-RIGHT will be listed to call
org-do-demote, while in the chapter on tables, it will be listed to
call org-table-move-column-right.