A microformat (sometimes abbreviated μF or uF) is a web-based data formatting approach that seeks to re-use existing content as metadata, using only XHTML and HTML classes and other attributes. This approach is intended to allow information intended for end-users (such as contact information, geographic coordinates, calendar events, and the like) to also be automatically processed by software.Microformats are becoming a critical building block of the symantec web. I recommend you to use microformats in your blogs and websites. It might cost you a little more time and a little more effort. But at the same time makes a lot more information already available in your blog/website, more useful in the sense that those can easily be phased by browsers, email clients, search engines and even web applications.
This time, I am adding support for XOXO to my blog. It's not the XOXO (Hugs and Kisses or Love and Kisses) used by Shweeeeet on her blog posts. ;) XOXO is yet another simple microformat (all microformats are simple, by the way) which could be used in lists, like blogrolls. So, I used it in my Link Bon'di.
Additionally, I am adding hCard in my profile in the blog. Wow! microformats are simple yet elegant and it interests me so much. It's nice to know that Blogger already uses rel-tag microformat in label links of posts.
At last, I always make sure that anything I develop, no matter is it a web page, a script or even the microformats I have implimented in my blog are valid. Because on the web no markup at all is better than malformed markup. Here the microformats vaidator comes to the rescue. Go, validate your microformats at the Optimus microformats validator. Equally, optimus is also a microformats transformer which can transform the data in blogs/sites with microformats, to some of the popular API formats. WoW! Now your blog/site could really be your API with goodness of microformats and the power of Optimus.