representative-h-card-parsing

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.

Algorithm

After Parsing the page:

• If the page contains an h-card with uid and url properties both matching the page URL, the first such h-card is the representative h-card
• If no representative h-card was found, if the page contains an h-card with a url property value which also has a `rel=me` relation (i.e. matches a URL in parse_results.rels.me), the first such h-card is the representative h-card
• If no representative h-card was found, if the page contains one single h-card, and the h-card has a url property matching the page URL, that h-card is the representative h-card
• If no representative h-card was found, the page has no representative h-card

Matching URLs

URLs are to be matched as per the parsing algorithm defined in https://url.spec.whatwg.org:

• Parse the URLs
• If every component matches, the URLs match

Implementations

Open source implementations of the representative h-card algorithm.

Back compat

All backcompat for representative h-card parsing should already be handled by the h-card backcompat rules, implemented by a conforming parser.