Concurrent with its announcement that Accelerated Mobile Pages (AMP) articles are now available in the search results, Google has added a new page to the Structured Data section of the Google Developers site: "Top Stories with AMP". This now joins "Live Blogs" in the section titled "Promote Content using Carousels".
This comes on the heels of AMP-facing changes to the Structured Data page for Article Rich Snippets made in December. While at time of writing the article rich snippets specifications remain unaltered, the new page unambiguously confirms that the structured data guidelines for article rich snippets were paving the way for AMP.
The new structured data guidelines for AMP-supported schema.org article types (Article, News Article, BlogPosting) are, in fact, nearly identical to those that appeared on the article rich snippets page in December.
Insofar as they're at all significant here are differences:
- The logo specifications for AMP remain the same as those for article rich snippets, but the AMP page now has a section dedicated to logos, including visual examples.
descriptionproperty is recommended for AMP articles, but is not annotated with "required" or "recommended" for article rich snippets.
- Examples in JSON-LD and microdata are provided for article rich snippets, but the sole AMP example is in JSON-LD.
The AMP page, however, additionally has a section providing specifications for marking up VideoObject, absent on the article rich snippets page.
Required VideoObject properties:
publisher(with nested properties
Recommended VideoObject properties:
Finally, the AMP page provides information both on how to use
<rel="canonical"> for AMP pages, and how to test pages to ensure they're AMP-compliant. For structured data markup specifically the guidelines unsurprisingly point users to Google's Structured Data Testing Tool. Additionally, there is now an AMP validation page on the main AMP site where users can validate whether their technical implementation of an AMP is valid.
It will be interesting to see whether the articles rich snippets page is altered – or even removed – in light of the new AMP additions.