Authors have a range of options to choose from when organizing a collection of [[wiki page]]s. Used in combination, these give a lot of flexibility.

:[[WikiWord]]:The most powerful organizing principle is the author's choice of page names. When a search returns a list of pages, their names need to be clear enough to guide a visitor to the right place.

:[[WikiPage]]:A page with text (and images), where the text can contain for instance [[WikiWord]]s that automatically becomes a link to another WikiPage.

:[[WikiGroup]]:PmWiki requires every page to be a member of a group. A group is like a wiki within a wiki; it can have its own presentation look, security controls and navigation aids. With default configuration, [[WikiWord]]s are only searched inside the current group, and you use either [@OtherGroup/MyWikiWord@] or [@OtherGroup.MyWikiWord@] to refer to pages in other groups (see [[Links]]).

:[[WikiTrails]]:A collection of pages, either in the same group or across multiple groups, can be designated as a trail. A visitor can move from stop to stop by clicking on ''next'' and ''previous'' links.

:[[Categories]]:Individual wiki pages can also be grouped by having tags and links to a common "category" page; we say that any pages that link to a common page are in a "category" defined by that page.  PmWiki uses the [@[[!category]]@] markup as a shorthand to place a page into a category with other pages containing the same markup.

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