We’ve known about the Dublin Core (www.dublincore.org ) pretty much forever. We know it has a following in Library Science, and content management systems, and Adobe uses their tags as the basis for the XMP (www.adobe.com/products/xmp/). And we knew that at least one of the original architects for the Dublin Core, Eric Miller (www.w3.org/People/EM/ ) is now deeply invested in the Semantic Web.