PmWiki has the capability of classifying pages into groups of related pages. WikiWords form links between pages of the same group; to create a link to a wiki page in another group, you use GroupName.WikiWord or GroupName/WikiWord to create the link.

By default, the RecentChanges page of each group shows only the pages that have changed within that group; the Main.AllRecentChanges page shows all pages that have changed in all groups.

Creating a new group is as easy as CreatingNewPages; simply edit an existing page to include a link to a page in the new group, then click on the '?' to edit the page.

Each group can also have a GroupHeader page that contains text to be automatically prepended to every page in the group. (No, there isn't a GroupFooter page yet.) A group can also have a GroupAttributes page that defines attributes (read and edit passwords) shared by all pages within the group. Each page can also have its own individual read/edit password that overrides the group passwords (see PmWiki.Passwords).

Finally, WikiAdministrators can set LocalCustomizations on a per-group basis--see PerGroupCustomizations.

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