Keywords in syntax

Keywords cannot contain embedded spaces.
The case of characters is not significant in keywords. For example, the keywords
FOR
and
for
are syntactically the same.
Keywords cannot be used for any other purpose; for example, as variable or element names.
An identifier preceded with a caret ^ can be the same name as an identifier. For example, you could use the identifier ^tag as an element name.

    tag dint ^tag := 0;