In every command scheme, keywords appear as words in both lower- and upper-case letters. When typing the command or
keyword in the command file, the user must at least copy literally the part with upper-case letters. SWAN reads
only this part. SWAN is case insensitive except for one instance (character strings), see below. When typing the
keyword in the command file, any extension of the part with upper-case letters is at the users discretion as long as
the extension is limited to letters or digits, as well as the characters - and _. So, in the first command outlined
above one may write: KEY or KEYW or KEY-word or keyhole, etc., whereas with the
abovementioned second command scheme, key1 KEY2 data may appear in the command file.
In the command file