link-preview-brainstorming
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This article is a stub. You can help the microformats.org wiki by expanding it.
This is part of an effort to define a standard link-preview microformat.
- link-preview-examples
- link-preview-formats - document from Facebook/OG, Google/G+, IE10, Twitter Cards
proposals
General approaches:
publishing
- In general: use h-entry on the
<body>element with a few additions likeu-photo,u-audio,u-video - Use h-card for pages of people or organizations,
- h-product for product pages
- (or whatever top level object the page represents)
parsing
Using a microformats2 parser, look for the first h-* on the page and use its:
- p-name (called "title" in some other approaches)
- p-summary (called "description" in some other approaches)
- u-url
- u-photo (called "image" in some other approaches)
- u-audio
- u-video
Existing link preview schemes allow differentiating the "page name" from the "site name," such as OpenGraph's og:site_name/og:title and Twitter Cards's twitter:domain/twitter:title. Is this worth investigating?
- The
<title>element usually features both, and sometimes a tagline. It's invalid to nest tags inside of it, so breaking it down is probably a bad idea. - The actual "domain name" should be easily computable, but the site name is often different. For example, multiple word names.
- The site name is usually marked up in a nice heading somewhere, so it should be trivial to attach another class name to it.
- A "site microformat" may scratch the itch of those who like putting up invisible rel=author and similar data, allow for explicit site-wide legal disclaimers vs. page-level (like Tumblr's policies vs. the content its users copyright on their blogs on a tumblr subdomain), site-wide tags/categories, and other various publisher vs. author distinctions.
Examples in the wild
Examples on the web of pages with h-entry on body: