A collection, typically of WebLog entries. Kinda like a [TopIc]. Bigger buckets than KeyWord-s.

Purpose:

• by having a separate RSS feed for each, a reader can limit himself to just a subset of a writer's flow.

  • this lets one potentially avoid cat pictures

  • this can have value in a Corporate Blogging context by letting an employee track just a certain subset of flow from staff groups like [HR]

  • note that both examples require the category grouping used by the writer to match the criteria on which readers would like to discriminate.

• a reader happening upon a single article can find other "similar" or "related" articles by browing the category.

Typically there's a flat list of Cate Gory values, with any given entry being assigned to 1-or-more buckets. But Dave Winer is (Nov'03) starting to use a hierarchy of categories - a Taxon Omy?

see Model Theism

WiKi uses categories, more commonly as a page "type" designator. See WikiWikiWeb:WikiCategories - these are used with Back Links as a searching mechanism.

But in a sense, every Wiki Word As Tag.

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