Microformats

Rohit Khare and Tantek \cCelik. Microformats: a pragmatic path to the semantic web. In Proceedings of the 15th international conference on World Wide Web, p. 865--866, ACM. 2006.
Khare, R.. Microformats: the next (small) thing on the semantic Web?. IEEE Internet Computing, 10(1):68--75, Jan.-Feb. 2006.
Microformats.org