Early on, during one of our Clearspace product development meetings, we (the Clearspace development team) discussed the importance of 'hackable' or 'meaningful' URL's. In other words, if someone sent you a link to a Clearspace blog via IM or email[1|#urls-1], you should be able to figure out a lot about the blog post without viewing it in your browser. So, for example, if my boss Bill sent me an IM that looked like this:

Hey Aaron, check out this blog entry:
http://mysite.com/do/entry?publicid=4B4C0B46DC743154ECB68300531D6A04&token=

I'd probably click on it, but I sure as heck wouldn't know what Bill was sending me too. Is he sending me another link to a blog that discusses the virtues of living in Iowa[2|#urls-2] or is it something work related? I can't tell. If however, he blogged about the link in Clearspace, his IM would look like this:

Hey Aaron, check out this blog entry:
http://mysite.com/blogs/bill/2006/12/19/iowa-jokes/

With only a cursory glance, it should be immediately obvious what this blog post is about (another Iowa joke), when it was posted (December 19th, 2006) and who posted it (Bill).  We can all agree this is 'a good thing', right? Hold on though to your corn husks though, it gets better.

Most blog software products in the wild give up at this point: they answer the question of who, what and why by looking at the URL of a single blog post and that's it. Clearspace, on the other hand, goes the extra mile for you.  Wouldn't it be nice to see a list of all of Bill's posts on the 19th of December?

http://mysite.com/blogs/bill/2006/12/19/

or how about all the posts in December?

http://mysite.com/blogs/bill/2006/12/

or 2006[3|#urls-3]?

http://mysite.com/blogs/bill/2006/

What about all his posts that are tagged with 'iowa'?

http://mysite.com/blogs/bill/tags/iowa

Bill's a smart guy, I should subscribe to his blog, I wonder what feeds he has available?

http://mysite.com/blogs/bill/feeds

Great, I can subscribe to all of his posts:

http://mysite.com/blogs/bill/feeds/posts

and a feed of all of his posts that are tagged with 'iowa':

http://mysite.com/blogs/bill/feeds/tags/iowa

but I'd really like those in Atom format rather than the default[4|#urls-4] RSS 2.0 format:

http://mysite.com/blogs/bill/feeds/posts/atom

and it would be nice to easily be able to include a list of his posts on the homepage of our intranet:

http://mysite.com/blogs/bill/feeds/posts/json

So there you have it: hackable and meaningful URL's galore.  If you're interested in learning about how we did it, you can read about the gory details over on my blog.

Now if I could just get Bill to stop sending me links about Iowa.

¹You're not using still using email are you?

²If you consider it a sport to gather your food by drilling through 18 inches of ice and sitting there all day hoping that the food will swim by, you might live in Iowa. (source)

³Hat tip to Tim Bray for nice way he implemented URL's on his blog.

⁴Yes, you can switch the default to be Atom.