Some microformats parsers such as UfXtarct and Sumo already have the ability, to target individual fragments of a page. So I have provided a simple fragment proxy service for the others. It allows you to define a URL of a page and the ID of any element and it returns a HTML page containing just that element.
proxyurl = http://ufxtract.com/testsuite/hcard/hcard1.htm
fragmentid = uf