TYPO3: what is the field "access_group" for? - typo3

Question

I don't know what is the field "access_group int(11) DEFAULT 0 NOT NULL" for? First I thought it's for restriction by user_group, but there is an field "fe_group varchar(100) DEFAULT '' NOT NULL" for it. You can find the field also at the documentation Preparing the database , but I couldn't find a description for it, only for "fe_group".

Answer 1

access_group is the be_user group.
In TYPO3 you have an access-system similar to the unix-rights, where you can grnat access to pages (and records in the page).
There is a menu entry System->Access where you select a page and can set values for multiple levels recursive:
You can set Owner and Group and the granted rights which are assigned for
Owner, Group, Everybody
the rights are coded bitwise (other order than displayed):
1 (2^0) Show page: Show/Copy page and content.
2 (2^4) Edit content: Change/Add/Delete/Move content.
3 (2^1) Edit page: Change page eg. change pagetitle etc.
4 (2^2) Delete page: Delete/Move page and content.
5 (2^3) New pages: Create new pages under this page.
These values can be set with TCEMAIN in the page TSconfig, so all pages in a sub tree might get the same rights.
Example:
TCEMAIN.permissions {
userid = 43
groupid = 5
user = 31
group = 19
everybody = 1
}
Each page will get the user with the uid 43 as owner,
the group will be the group with the uid 5,
the owner has every right,
the group can show page, edit page, edit content but can not delete page or create new pages below
every one else can see the page
Alternatively you can set the rights by keywords:
TCEMAIN.permissions {
userid = 43
groupid = 5
user = show, edit, delete, new, editcontent
group = show, edit, editcontent
everybody = show
}
comment from Rudy Gnodde, which I agree:
This is only used for pages, not in custom tables for extensions. It's probably a mistake in this documentation. It should be fe_group I think (which is mentioned in this documentation, but not in the code example which contains access_group).
As TYPO3 manuals can be edited by everyone (there is a button Edit me on GitHub in the upper right corner), I have proposed a correction.