rel-tag-spaces

This is a list of "name paces" suitable for use in tagging, and by the rel-tag microformat. Please feel free to add to it, in alphabetical order

A9

• One word - http://a9.com/microformats
• Multi-word - http://a9.com/?q=brown+sugar

Technorati

• One word - http://technorati.com/tag/cheese
• Multi-word - http://technorati.com/tag/apple+pie

Wikipedia

• One word - http://en.wikipedia.org/wiki/microforamts
• Multi-word - http://en.wikipedia.org/wiki/brown_sugar

Issues

• Case sensitivity (http://en.wikipedia.org/wiki/Perry%20Barr works; http://en.wikipedia.org/wiki/perry%20barr does not)
• Caution should be exercised when using Wikipedia as a name-space. For example, an article about Birmingham, Alabama, tagged with a link to http://en.wikipedia.org/wiki/Birmingham would link to an article about Birmingham, England.

Wikitravel

For place names.

• One word - http://wikitravel.org/en/London
• Multi-word - http://wikitravel.org/en/East_Grinstead

Issues

• A tag using, e.g. http://wikitravel.org/en/Newcastle will link to a disambiguation page.