Google Updates Structured Data Requirements

Specifically, Google added recommendation to use datePublished and dateModified properties to the article content type..   In those situations it may be useful to signal to Google and the readers that article is of publication date.   For older article that is updated, then it may make sense to signal to Google and site visitors than article has been modified to keep it relevant to the moment..   example could be technology related article where the technology is updated and so tutorial would also need to be updated to keep it relevant..   dateModified property is useful for signaling that the article was modified.   I asked Casey about this including their structured data..   The documentation at Schema org has published example of how to use datePublished with JSON-LD.   This gives more weight to Casey Markey's of the use of this property for recipe content...   One way to decide whether to use these properties is to consider if the visitor needs to know that page was updated.   Hat tip to Aaron Bradley for noticing the update to the developers page..   Read more