Keyword (key_word). A distinction is made between “normal” and reserved keywords.
<key_word> ::= <not_reserved_key_word> | <reserved_keyword>
Keywords can be entered in uppercase/lowercase characters. If possible, the keywords should not be used to designate objects.
You can find a list of all not_reserved_key_word keywords in the syntax list: not_reserved_key_word
Reserved keywords (reserved_keyword) must not be used in simple identifiers. Reserved keywords, however, can be specified in the form of special identifiers. You can find a list of all keywords in the syntax list: reserved_key_word
See also: