I have been looking around at tagging and noticed that the ABC online use a specific style of tagging. An example ‘government-and-politics’. They sometimes use 2-3-4 word tags. This style of tagging seems to be referred to as a multi-word tag on the microformats wiki, which are done in varying ways and supported by different social media websites.
Examples of variations (world-politics world_politics world+politics world.politics WorldPolitics) delicious as far as I can tell supports all of these combinations, what microformats calls combined tags (from delicious):
The only limitation on tags is that they must not include spaces. So if your web page is about a two-word place like “San Francisco”, you may want to tag it as sf, san-francisco, SanFrancisco, san.francisco, or whatever else makes sense to you. You probably don’t want to use commas, though, since a comma will be become part of the tag.
On the videoblogging mail list David Meade in the post ‘[videoblogging] tagging posts in wordpress question’ notices some issues with WordPress where wordpress replaces a + with a dash. All pointing to a lack of consistency across tagging. ABC categorises these stories under the following”:
Every one of our stories includes metadata on things like subjects, locations, importance and genre.