Taxonomy is the scientific practice of categorizing things.  For example, taxonomy is use to classify organisms.  The Dewey Decimal System was created in the 1800's and is a taxonomy.  The Library of Congress has a taxonomy.

When you get right down to it, a taxonomy is a preset tagging system.  In Dewey, if a book is on Technology it falls within "600".  In the Library of congress, the same volume would fall within "T".  These tags create:

• structure
• hierarchy
• standards

They also tend to be:

• specific to one use
• non-adaptive

Folk Taxonomy or Folxonomy allows users to create tags which means that you can have a virtually infinite set.  Systems that use folxonomy include Drupal, Joomla, Flickr, YouTube, Revver, and Google Video. 

If you don't know about YouTube you must be living a sheltered life... YouTube is a video sharing site that has successfully captured a huge portion of the Internet video market. It has come under some criticism for allowing large quantities of copyright material to be pirated and uploaded onto the site. None the less, YouTube is a powerful tool that can be used by the nonprofit community to raise awareness and market.

What do I need to post and tag on YouTube?

1. An account. Signing up is easy. Go to YouTube.com and click on sign up in the top right corner of the screen. Enter in the required fields and submit. You will get a verification email which with a link that you need to click on to activate your account.
2. Upload a video. This presupposes that you have videos ready to go. YouTube accepts a wide variety of different video formats including: .WMV, .AVI, .MOV, and .MPG. Uploading a video is simple. First click on upload videos in the top right corner of the site. Second, enter in a name, description, and TAGS. For the Nonprofits in Second Life site, we are asking folks to use NPSL as a tag to identify it as related content. Choose a category and a language. Click "Continue Uploading". Browse for your file on your computer. Just like on Flickr, you can then decide who can see your video--will it be public or private to friends and/or family. Click Upload.
3. This will bring you to a page with a snippet of code you can use to embed your video into your Web site. In my case this looked like this...

<object width="425" height="350"> <param name="movie" value="http://www.youtube.com/v/04dCZ3Rzsho"> </param> <embed src="http://www.youtube.com/v/04dCZ3Rzsho" type="application/x-shockwave-flash" width="425" height="350"> </embed> </object>

My next few posts will deal with tagging on different social networking sites and will be crossposted from NonProfits in Second Life. This first tutorial will focus on Flickr.

In all the social networking sites that you might post to, there is something in common--tagging. Simply put, tags are little pieces of data that let people know what your information--whether it be an image, a video, or text--is about. For example, you could tag a picture of the castle in Warwick, UK on Flickr with "Warwick castle UK England" and when someone searched on these criteria would have the following results returned: