They knew the train would come

by Taylor Cowan

Lately I'm becoming more bullish on RDFa. I loose heart when things don't materialize on my timeline, however, I was recently reminded of a scene in "Under The Tuscan Sun" wherein the actor describes how they built tracks over the Alps before there was a train in existence that could make the trip.

"They built it because they knew someday the train would come..."

That's similar to what the semantic web community is doing. In my analogy the tracks are the specifications (RDF, OWL, RDFa) and data sources. The train is of course applications that use these specifications and information to make our online lives more convenient. And for me personally, the mountain is grasping how it all works and most important of all, applying it in the real world.

That brings me to what I want to share. If you are particularly interested in RDFa, is probably the best link to watch. I found a very well written and informative tuturiol on linked data that I highly recommend for anybody gearing up to apply this technology. The recommendation to "not define new vocabularies from scratch" struck me as particularly good advice. If you are wondering what the more common, well used and understood RDF vocabularies are, here are my top 5:


2008-04-04 07:54:49
Hi, maybe it's good idea to add ical: and geo: to the list. We often want to describe something with time and/or place.
2008-04-04 09:42:03
Thanks Masaka, I agree, those belong in the short list.

6. xmlns:geo=""
7. xmlns:ical=""

Morten Høybye Frederiksen
2008-04-04 12:40:22
Following the changes to Dublin Core in January -- -- removing the first one on the list should be considered, at least for future use...