Daily Archives: October 14, 2005

On Tagging

I’ve been talking with a few people recently about the phenomenon of tagging (not the grafitti kind), or “folksonomies,” if you will. The common opinion seems to be that of skepticism. That organization by user-created “tags” or keywords is inherently flawed because multiple users will tag something differently. What happens when one person tags a photo of a VW bug with “automobile” and another tags it with “car”? To me that seems like the beauty of the system, the diversity of classification. Chances are you’ll get another person, or better yet, multiple people, who end up tagging it with both “automobile” and “car”. The system now has enough information to know that in some ways “automobile” and “car” are related and should maybe be placed in the same group.

Flickr has figured this out with their clusters. Here’s a good example of Flickr’s clusters doing their thing, with the word “beetle.” We get one cluster for Volkswagens and one for insects. But there’s also a third cluster thrown in there with the word “macro” similar to the insects cluster. Is it perfect? No, but it’s not bad.

How does del.icio.us handle things? When you add a new bookmark or link to your del.icio.us account, they provide a brief list of suggested tags based on tags that other users’ have entered. This helps with some of the ambiguity, but again it isn’t foolproof. When you’re adding a new site that has never been bookmarked before in del.icio.us, well, you’re on your own. Or head to Tagyu to get some recommendations.

Despite the trouble of relying on imperfect people to classify information on their own, I still think that tagging is where we’re headed in the next big search revolution. In fact, if you think about what Google did with their search and Pagerank, it’s basically a “folksonomy.” Website A links to Website B with the word “automobiles.” Website B now scores a higher pagerank for the word. Who would ever have thought that would make for a good way to search the Internet? For better, or worse, but mostly better, Google has treated hyperlinks as a kind of tag, or descriptor. The flaws in this system are obvious. I mean, look, I just linked to a Wikipedia entry about Google-bombing, using the word “worse.” Does that entry have anything to do with “worse”? It’s a stretch, but not really.

Whichever big internet player grabs an established system like del.icio.us next (I’m rooting for Yahoo!), will have a whole heck of a lot of classified, and categorized websites, ripe for integration with the next generation search. We’ll start to see more blogging software with tags built-in, and photos, links and music all tagged interconnectedly. I can’t wait to see the results. Not to mention the dawn of tag-spam. Spag?