With the slide below on the Semantic Technology Value Chain, I attempted to present my view of the Semantic Web world(s), to inform the discussion recently started through the latest Semantic Web Gang podcast on the top plays in this space. Mills Davis of the Semantic Exchange is working on a much more detailed version of this market segmentation effort, so this is not intended to represent more than a personal overview.
(click on the picture for a larger view)
Twine and Open Calais are both interesting contenders, but the competition for the title of semantic champion still suffer from a certain lack of heavyweights, although the game is definitely heating up. Only one thing is sure, the value of metadata is on the rise.