Conceptually, a Wikit is a searchable collection of inter-referential pages entered in a markup language and displayable/editable by several user interfaces.

Wikit functionality falls into four general and orthogonal categories:

1. '''Content and Title Keyword Search'''

As [snitvfs] points out, keyword and title keyword search functionality is directly supported by [metakit] views, using the ''mk::select'' facility ''-keyword''.  This is also provided by [mkvfs] as a special case of its pass-through to [metakit] select.

2. '''Titles: Linkage between pages'''

Wikit provides the ability to reference pages in a [[keyword]] form within markup, where the keyword maps to a page title.

This is implemented by a metakit view mapping referring->referenced pages, which is updated by inspection of pages upon creation, editing and re-titling.  [mkvfs] could store titles as a [file] attribute and make them searchable as for content.

3. '''Markup Language with display conversi ons'''

Wikit has a markup language described in [Formatting Rules].  It is re-parsed then converted on-the-fly to several different user interface formats, specifically HTML and [Tk] [Text] widget commands.  Absent a page-typing system, only one kind of markup is supported.  Given a more general page store, content typing could be used to store and deliver arbitrary file types.  [mkvfs] can be generalised to support arbitrary meta-data such as mime-type by means of [file] attribute.

Different markups would be possible, as would 

4. '''User Interfaces - Tk GUI and HTTP/HTML'''

5. '''Revision History'''

This could be provided by [a versioning virtual filesystem]

6. '''Image Storage'''

Images can be stored in the Wikit, details of this mechanism are unclear to the author.

7. '''User and Modification Control'''

Wikit provides rudimentary modification control by specifying a hard-coded list of page numbers which may only be edited via the Tk GUI, or from localhost by HTTP.  [mkvfs] supports unix access and ownership semantics, with user identification in a separate module.

- [CMcC] 20040726