[TYPO3] Different column&table as source for keywords

[Daniel]

Hi to all,

is it possible to use another table as the source of a page keywords?
As I've seen, we can use:

page.meta.KEYWORDS.field = keywords

which points to the 'keywords' column in the pages table. Now I want
to know, first of all which kind of type/object page.meta.KEYWORDS is
and if there is a way to change the column&table!

Thanks in advance,
Daniel