Functions	WSS 3.0/MOSS 2007	Column/View Permission
Make SharePoint Columns invisible or read-only to certain people		●
Make SharePoint list views invisible or read-only to certain people		●
Make SharePoint Item's Attachments invisible or read-only to certain people		●

SharePoint Column/View Permission can hide SharePoint columns/list views and make SharePoint columns READ-ONLY. SharePoint default permission scheme does not define permissions on SharePoint columns/list views. By overwriting some control templates, SharePoint Column/View Permission can implement SharePoint column permissions and SharePoint view permissions in lists.

SharePoint Column View Permission allows SharePoint Administrators to hide SharePoint Columns or set them as read-only to certain viewers.

1. SharePoint columns can be hidden to some users/groups if you set INVISIBLE columns for them:

• The contents of this column will be HIDDEN to him/her in item display form or edit form;
• List views which contain SharePoint hidden columns are also invisible to him/her and cannot be selected by him/her in View Select Menu.

2. SharePoint users/groups have NO EDIT permission to some columns if you set SharePoint read only column:

• The contents of this column will be read-only to him/her in item edit form;
• List views, which contain this SharePoint read only column, cannot be switched to datasheet view or edited in MS Access, as the menu items in Actions Menu will be hidden to him /her.

SharePoint View Permission allows SharePoint Administrators to set permission on SharePoint Views, making them read-only or invisible to certain users.

1. If SharePoint user has NO READ permission to some list view, the list view will be hidden in View Select Menu;

2. If SharePoint user has NO EDIT permission to some list view, the view cannot be switched to datasheet view or be edited in MS Access (the menu items in Actions Menu will be hidden to him /her)

SharePoint Column View Permission can also make items’ attachments invisible or read-only to certain people.

SharePoint column permission and SharePoint view permission is highly expected by many IT managers and developers; because permissions on column/list view provide another permission control dimension. SharePoint 2007 doesn’t provide permissions on SharePoint columns and SharePoint list views directly; but we can implement SharePoint column permission/list view permission in representation layer by overwriting default control templates. Even if you can bypass this way through API invoking, it is still useful to those who eagerly need column permission and list view permission.