Invalid tag extension name: dfn are an HTML standard that express people, events, reviews, recipes, datestamped content, and other structured data in web pages in a way that makes them easily usable by web browser, search engines, and other web crawlers.
Web browsers in particular are able to associate the data with particular actions and provide a richer user experience for pages marked up with microformats.
- hCard - people and organizations
- hCalendar - events
- hReview - reviews of places, people, events, products, etc.
- hAtom - blog posts, status updates, and any kind of episodic content
- adr - structured addresses
- geo - latitude/longitude geolocations
- see http://microformats.org/wiki/ for more.
Firefox has some microformats parsing support in the Toolkit "product", microformats "component":
- Social Bookmarking: Microformats can be passed to share, bookmarking, read-it-later, etc. style services to enable "rich pinning" of objects in the page.
- Shopping: Microformats such as hReview, hProduct, and hListing support rich markup of products, useful in shopping carts, watching products for updates, product comparison shopping, etc.
- automatically detecting venues, people, contacts, events, locations and integrating with built-in contacts, calendar, and mapping user interfaces.
- FirefoxOS (Gaia/System/Microformats)
- Better control by content producers
- Easy manipulation of data by clients without server side involvement
- Accurate data collection by services
Firefox Implementation Introduction
For background information on microformat detection, please see this series of blog posts by Alex Faaborg:
- Part 0: Introduction
- Part 1: Structured Data Chaos
- Part 2: The Fundamental Types
- Part 3: Introducing Operator
- Part 4: The User Interface of Microformat Detection
- Brainstorming page about the user experience of microformat detection, please feel free to contribute any design work, or to comment on these conceptual mockups.
- Information about about the user interface of microformat detection can also be found on the microformats.org wiki
Michael Kaply is working on the microformats implementation in Firefox 3. There is some overlap with the content handling work being done by Dan Mosedale, and Alex Faaborg is working on the user interface.
microformats is implemented in a module in Firefox.