Several microformats have been developed to enable semantic markup of particular types of information.
- hAtom – for marking up Atom (standard) feeds from within standard HTML
- hCalendar – for events
- hCard – for contact information; includes:
· adr (microformat) – for postal addresses
· geo (microformat) – for geographical coordinates (latitude, longitude)
- hReview – for reviews
- hResume – for resumes or CVs
- rel-directory (file system) – for distributed directory creation and inclusion
- rel-nofollow, an attempt to discourage 3rd party content spam (e.g. spam in blogs).
- rel-tag (metadata) – for decentralized tagging (Folksonomy)
- xFolk – for tagged links
- XHTML Friends Network (XFN) – for social relationships
- XOXO – for lists and outlines
