The Semantic Web is not a very fast growing technology.That's from the first page of W3School's semantic Web tutorial. My knowledge of the semantic Web goes a little beyond what that page covers, but I was brushing up on my XML there anyway, so...
One of the reasons for that is the learning curve. RDF was developed by people with academic background in logic and artificial intelligence. For traditional developers it is not very easy to understand.
Note: W3Schools is notorious for inaccuracies—you've been warned.
...but in this case,
<words type="famous last">I deemed it adequate to brush up on a pretty simple markup language.</words>
Now I'm not a traditional developer. In fact, I'm not
Ah, what the hell. I think I know the XML "train system" well enough to get to RDF "station". Ah, wait, here we are. I'm getting off, I heard there's lots to do at this stop.
On to RDF!