Why are these words reserved in V$RESERVED_WORDS, when the columns indicate they are not?

Hello,

In Oracle 12 documentation writes the following about the view V$RESERVED_WORDS :

"V$RESERVED_WORDS displays a list of all SQL keywords. To determine whether a particular keyword is reserved in any way, check the RESERVED, RES_TYPE, RES_ATTR, and RES_SEMI columns."

But there are words in this view where all columns values for columns are RESERVED, RES_TYPE, RES_ATTR, and RES_SEMI are all "N".

ex:

select * from v$reserved_words

where RESERVED = 'N'

and RES_TYPE ='N'

and RES_ATTR = 'N'

and RES_SEMI = 'N'

order by 1,2

KEYWORD                            LENGTH RESE RES_ RES_ RES_ DUPL     CON_ID