From the Dataverse Blog:
Search results account for a large portion of traffic to datasets published online. For example, since Dataverse 4 was released in June 2015, at least a fifth of the traffic to dataset pages in the largest Dataverse installation, Harvard Dataverse, has come from search engines, mostly Google. Giving search engines and other systems richer metadata to index datasets will help people find data faster.
This past summer, Dataverse added citation metadata to the markup of dataset landing pages, using the Dublin Core standard to enhance web discoverability of datasets and help browser plugins export metadata to reference managers like Zotero and Endnote. In November, the team consulted with members of the Dataverse community for its latest push to publish similar citation metadata using Schema.org.
Dataverse uses the dataset “type” and its set of recommended properties, taking cues from Google’s guidelines and the ways in which several other repositories are using Schema.org to describe datasets.