representative-h-card-parsing - Microformats Wiki

Assuming you already have access to a microformats2 parser, the algorithm defined here allows you to determine the representative h-card for a given page.
This algorithm is the microformats2 update to representative-hcard-parsing.
After parsing the page:
URLs are to be matched as per the parsing algorithm defined in https://url.spec.whatwg.org:
Open source implementations of the representative h-card algorithm.
All backcompat for representative h-card parsing should already be handled by the h-card backcompat rules, implemented by a conforming parser.