Java Reference
In-Depth Information
There are many databases built using Wikipedia that extract relationships and information
such as:
•
Resource Description Framework
(
RDF
): This uses triples such as Yosemite-
location-California, where the location is the relation. This can be found at
ht-
•
DBPedia
: This holds over one billion triples and is an example of a knowledge
base created from Wikipedia. This can be found at
http://dbpedia.org/About
.
Another simple, but interesting example, is the Infobox that is presented when a Google
search of "planet mercury" is made. As shown in the following screenshot, not only do we
get a list of links for the query but we also see a list of relations and images for Mercury
displayed on the right-hand side of the page:
Information extraction is also used to create Web indexes. These indexes are developed
for a site to allow a user to navigate through the site. An example of a web index for the
