im Spalding at LibraryThing has introduced a new wrinkle in the tagosphere…and wrinkles are welcome because they pucker space in semantically interesting ways. (Block that metaphor!)
At LibraryThing, people list their books. And, of course, we tag ‘em up good. For example, Freakonomics has 993 unique tags (ignoring case differences), and 8,760 total tags. Now, tags are of course useful. But so are subject headings. So, Tim has come up with a clever way of deriving subject headings bottom up. He’s introduced “tagmashes,” which are (in essence) searches on two or more tags. So, you could ask to see all the books tagged “france” and “wwii.” But the fact that you’re asking for that particular conjunction of tags indicates that those tags go together, at least in your mind and at least at this moment. Library turns that tagmash into a page with a persistent URL. The page presents a de-duped list of the results, ordered by interestinginess, and with other tagmashes suggested, all based on the magic of statistics. Over time, a large, relatively flat set of subject headings may emerge, which, subject to further analysis, could get clumpier and clumpier with meaning.
You may be asking yourself how this differs from saved searches. I asked Tim. He explained that while the system does a search when you ask for a new tagmash, it presents the tagmash as if it were a topic, not a search. For one thing, lists of search results generally don’t have persistent URLs. More important, to the user, tagmash pages feel like topic pages, not search results pages.
And you may also be asking yourself how this differs from a folksonomy. While I’d want to count it as a folksonomic technique, in a traditional folksonomy (oooh, I hope I’m the first to use that phrase!), a computer can notice which terms are used most often, and might even notice some of the relationships among the terms. With tagmashes, the info that this tag is related to that one is gleaned from the fact that a human said that they were related.
LibraryThing keeps innovating this way. It’s definitely a site to watch.