Is there any killer application for Ontology/seman

Question

I got interested in semantic technologies after reading a lot of books, blogs and articles on the net saying that it would make data machine-understandable, allow intelligent agents make great reasoning, automated & dynamic service composition etc..

I am still reading the same stuff from 2 years. The number of articles/blogs/semantic-conferences have increased considerably. But I am still unable to see any killer-application. Why is it so? Or is there some application/product (commercial/open-source) already existing, which actually is doing all that being boasted of?

To put it more precisely, is there any product that leverages semantic technologies (esp RDF/OWL/SPARQL) and is delivering functionality/performance/maintainability, which would not have been possible with the existing (no-semantic) technologies? Some product that is completely dependent on semantic technologies and really adds value to the customers and generating revenues?

Answer 1

In biology, the interest in RDF & related technology is very high. People want both less parsing and custom code to integrate data, and more advanced queries. RDF is already providing the former; for example, UniProtKB, one of the biggest biomedical resources, are offering their data in RDF. For advanced querying we're not quite there yet, as performance and availability of good RDF data and OWL ontologies is still a bit lacking. But it's starting, check out BioGateway for an example of what can be done.

In that light, the fruits of these technologies are not individual killer apps, but all the accumulated time savings for researchers who can explore the data instead of writing ad hoc scripts and setting up temporary SQL databases and all this plumbing.

Answer 2

Protege is good for developing ontologies.

Answer 3

The semantic web relies on content providers taking the effort to properly annotate everything to make it machine-readable.

That is too much work for most people that are not librarians.

The real killer app seems to be something that can derive semantics from unstructured content without special markup. Look at the amazing job Google for example has done with its search-engine.

In order for a system to work, it must not place a heavy burden on its users.

A middle ground are tagging systems like here on Stackoverflow. They work pretty well, even though the tags are completely adhoc and in parts inconsistent.

Answer 4

I think Drupal 7 stands a chance of being a killer semantic app, it's the next version of a CMS with a sizeable install base and when the release is final and everyone starts upgrading suddenly tons of sites will be automatically exposing RDF in the form of embedded RDFa without any intervention on the part of users.

From a business viewpoint I think things linked data stuff like GoodRelations are a potential killer app, for example see these Scott Brinker and Priyank Mohan blog posts which discusses how BestBuy experienced a 30% increase in traffic after starting embedding GoodRelations based linked data as RDFa in their web pages.

In general linked data is an excellent way to augment your site with machine readable data and shows remarkable results in the visibility of your site, I've recently seen a couple of presentations by guys from the BBC whose wildlife finder application (a linked data application using BBC natural history resources) already outperforms some Wikipedia pages for animals in Google search results

Answer 5

I was impressed with AceWiki. It's one of several wiki projects out there that's attempting to semantically organize the information people enter.

It's still a work in progress, and has some limitations. For example, it only allows people to enter sentences that conform to a subset of English vocabulary and grammar.

However, I hope these take off. There's such a huge amount of free data out there (e.g. Wikipedia) and we can't create programs to reason over it because the content is too noisy.

Answer 6

Just discovered DBpedia. It's a promising attempt to represent a lot of data from Wikipedia as RDF. You can download the entire extraction as a 16GB file, but it also has a keyword search page. Being represented as RDF allows for very specific "semantic" queries. This shows a few example queries, such as how you would find a list of the official websites of companies with more than 50000 employees. You can even query "the cloud" remotely with any wrapper that can interface with its public API, such as this Python module.