H-card

h-card is a simple, open format for publishing people & organizations on the web, using a 1:1 representation of vCard4 properties and values in HTML. h-card is one of several open microformat standards.

• Firefox 3+ supports hCard.
• Install the Operator Add-on to view and use hCard events in pages.

See the h-card specification for more:

http://microformats.org/wiki/h-card