The website contains dublin core meta data extensions.
https://dublincore.org
Syndication Techniques
Get access to data on 1,675,292 websites Dublin Core Customers. We know of 576,495 live websites using Dublin Core and an additional 1,098,797 sites that used Dublin Core historically and 183,137 websites in the United States.
Get a list of 1,675,292 websites using Dublin Core which includes location information, hosting data, contact details, 576,495 currently live websites and an additional 605,792 domains that redirect to sites in this list. 1,098,797 sites that used this technology previouslyand 183,137 websites in the United States currently using Dublin Core.
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