Kas Thomas recently commented on Adobe’s Extensible Metadata Platform (XMP) which he thinks is on its way becoming an ISO standard. Thomas writes, “for at least three years I’ve been saying that it would be in Adobe’s best interest to hand oversight over this ostensibly open standard to a bonafide Standards Body (rather than let adoption languish as people continue to associate XMP with ‘Adobe-proprietary’). Happily, Adobe is in fact now doing the right thing: XMP is in the process of becoming ISO-16684-1, via an effort led by my colleague Frank Biederich. This effort couldn’t have come at a better time. The content world is in desperate need of an industry-standard way to represent rich-content metadata, and I strongly believe XMP is the right technology at the right time.” Read more

Announcing Semantic Tech & Business Conference - San Francisco 2012

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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.

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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.
So, we knew it was just a matter of time until we came to a client who was implementing a content management system using the Dublin Core tags and who wanted to integrate that with their Enterprise Ontology.
We just assumed there was a Dublin Core OWL implementation just for this purpose. If there is, it’s pretty well hidden. (One of my motivations in writing this blog is to see if this brings it out of the woodwork). The obvious one (the one that comes up first in a Google search) is from Stanford  (protege.stanford.edu/plugins/owl/dc/protege-dc.owl). On closer inspection, the only OWL property used in this ontology is the owl:annotationProperty (comment). The rest of it is really just naming the tags and providing the human readable definitions. But this isn’t really helpful for integration.
It turns out there are several other problems with the Dublin Core for this type of usage. For instance, the preferred usage of the “creator” tag is a LastName, FirstName literal. LastName, FirstName is pretty ambiguous. There are a lot of “Smith, John”s in most corporate databases. And in many cases we know much more precisely (to the urn: level) which John Smith we’re dealing with when we capture the document.
So, we ended up, I’m sure, re-inventing the wheel. We have built an OWL version of the Dublin Core suitable for integration with Enterprise Ontologies. I’m on the road again starting tomorrow, but within a week or two we expect to have it vetted and out in a suitable public place. In the next installment I’ll go over some of the design tradeoffs we made along the way. By the way, what suitable public places are people going to for their ontologies these days?

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